Compares this object with the specified object for order. Returns zero if this object is equal to the specified other object, a negative number if it's less than other, or a positive number if it's greater than other.

Since Kotlin 1.6

dec

operator fun dec(): Char

Returns this value decremented by one.

Since Kotlin 1.0

operator external fun dec(): Char

Returns this value decremented by one.

Since Kotlin 1.3

digitToInt

fun Char.digitToInt(): Int

Returns the numeric value of the decimal digit that this Char represents. Throws an exception if this Char is not a valid decimal digit.

Since Kotlin 1.5

fun Char.digitToInt(radix: Int): Int

Returns the numeric value of the digit that this Char represents in the specified radix. Throws an exception if the radix is not in the range 2..36 or if this Char is not a valid digit in the specified radix.

Since Kotlin 1.5

digitToIntOrNull

fun Char.digitToIntOrNull(): Int?

Returns the numeric value of the decimal digit that this Char represents, or null if this Char is not a valid decimal digit.

Since Kotlin 1.5

fun Char.digitToIntOrNull(radix: Int): Int?

Returns the numeric value of the digit that this Char represents in the specified radix, or null if this Char is not a valid digit in the specified radix. Throws an exception if the radix is not in the range 2..36.

Since Kotlin 1.5

downTo

infix fun Char.downTo(to: Char): CharProgression

Returns a progression from this value down to the specified to value with the step -1.

Since Kotlin 1.0

equals

open operator override fun equals(other: Any?): Boolean

Since Kotlin 1.0

open operator override fun equals(other: Any?): Boolean

fun equals(other: Char): Boolean

Since Kotlin 1.3

equals

fun Char.equals(other: Char, ignoreCase: Boolean = false): Boolean

Returns true if this character is equal to the other character, optionally ignoring character case.

Since Kotlin 1.0

hashCode

open override fun hashCode(): Int

Since Kotlin 1.3

inc

operator fun inc(): Char

Returns this value incremented by one.

Since Kotlin 1.0

operator external fun inc(): Char

Returns this value incremented by one.

Since Kotlin 1.3

isDefined

expect fun Char.isDefined(): Boolean

Returns true if this character (Unicode code point) is defined in Unicode.

Since Kotlin 1.5

actual fun Char.isDefined(): Boolean

Returns true if this character (Unicode code point) is defined in Unicode.

Since Kotlin 1.5

actual inline fun Char.isDefined(): Boolean

Returns true if this character (Unicode code point) is defined in Unicode.

Since Kotlin 1.0

actual fun Char.isDefined(): Boolean

Returns true if this character (Unicode code point) is defined in Unicode.

Since Kotlin 1.3

isDigit

expect fun Char.isDigit(): Boolean

Returns true if this character is a digit.

Since Kotlin 1.5

actual fun Char.isDigit(): Boolean

Returns true if this character is a digit.

Since Kotlin 1.5

actual inline fun Char.isDigit(): Boolean

Returns true if this character is a digit.

Since Kotlin 1.0

actual fun Char.isDigit(): Boolean

Returns true if this character is a digit.

Since Kotlin 1.3

isHighSurrogate

expect fun Char.isHighSurrogate(): Boolean

Since Kotlin 1.0

actual fun Char.isHighSurrogate(): Boolean

Returns true if this character is a Unicode high-surrogate code unit (also known as leading-surrogate code unit).

Since Kotlin 1.1

actual inline fun Char.isHighSurrogate(): Boolean

Returns true if this character is a Unicode high-surrogate code unit (also known as leading-surrogate code unit).

Since Kotlin 1.0

actual external fun Char.isHighSurrogate(): Boolean

Returns true if this character is a Unicode high-surrogate code unit (also known as leading-surrogate code unit).

Since Kotlin 1.3

isIdentifierIgnorable

inline fun Char.isIdentifierIgnorable(): Boolean

Returns true if this character (Unicode code point) should be regarded as an ignorable character in a Java identifier or a Unicode identifier.

Since Kotlin 1.0

external fun Char.isIdentifierIgnorable(): Boolean

Returns true if this character (Unicode code point) should be regarded as an ignorable character in a Java identifier or a Unicode identifier.

Since Kotlin 1.3

isISOControl

expect fun Char.isISOControl(): Boolean

Returns true if this character is an ISO control character.

Since Kotlin 1.5

actual fun Char.isISOControl(): Boolean

Returns true if this character is an ISO control character.

Since Kotlin 1.5

actual inline fun Char.isISOControl(): Boolean

Returns true if this character is an ISO control character.

Since Kotlin 1.0

actual external fun Char.isISOControl(): Boolean

Returns true if this character is an ISO control character.

Since Kotlin 1.3

isJavaIdentifierPart

inline fun Char.isJavaIdentifierPart(): Boolean

Returns true if this character (Unicode code point) may be part of a Java identifier as other than the first character.

Since Kotlin 1.0

isJavaIdentifierStart

inline fun Char.isJavaIdentifierStart(): Boolean

Returns true if this character is permissible as the first character in a Java identifier.

Since Kotlin 1.0

isLetter

expect fun Char.isLetter(): Boolean

Returns true if this character is a letter.

Since Kotlin 1.5

actual fun Char.isLetter(): Boolean

Returns true if this character is a letter.

Since Kotlin 1.5

actual inline fun Char.isLetter(): Boolean

Returns true if this character is a letter.

Since Kotlin 1.0

actual fun Char.isLetter(): Boolean

Returns true if this character is a letter.

Since Kotlin 1.3

isLetterOrDigit

expect fun Char.isLetterOrDigit(): Boolean

Returns true if this character is a letter or digit.

Since Kotlin 1.5

actual fun Char.isLetterOrDigit(): Boolean

Returns true if this character is a letter or digit.

Since Kotlin 1.5

actual inline fun Char.isLetterOrDigit(): Boolean

Returns true if this character is a letter or digit.

Since Kotlin 1.0

actual fun Char.isLetterOrDigit(): Boolean

Returns true if this character is a letter or digit.

Since Kotlin 1.3

isLowerCase

expect fun Char.isLowerCase(): Boolean

Returns true if this character is lower case.

Since Kotlin 1.5

actual fun Char.isLowerCase(): Boolean

Returns true if this character is lower case.

Since Kotlin 1.5

actual inline fun Char.isLowerCase(): Boolean

Returns true if this character is lower case.

Since Kotlin 1.0

actual fun Char.isLowerCase(): Boolean

Returns true if this character is lower case.

Since Kotlin 1.3

isLowSurrogate

expect fun Char.isLowSurrogate(): Boolean

Since Kotlin 1.0

actual fun Char.isLowSurrogate(): Boolean

Returns true if this character is a Unicode low-surrogate code unit (also known as trailing-surrogate code unit).

Since Kotlin 1.1

actual inline fun Char.isLowSurrogate(): Boolean

Returns true if this character is a Unicode low-surrogate code unit (also known as trailing-surrogate code unit).

Since Kotlin 1.0

actual external fun Char.isLowSurrogate(): Boolean

Returns true if this character is a Unicode low-surrogate code unit (also known as trailing-surrogate code unit).

Since Kotlin 1.3

isSurrogate

fun Char.isSurrogate(): Boolean

Returns true if this character is a Unicode surrogate code unit.

Since Kotlin 1.0

isTitleCase

expect fun Char.isTitleCase(): Boolean

Returns true if this character is a title case letter.

Since Kotlin 1.5

actual fun Char.isTitleCase(): Boolean

Returns true if this character is a title case letter.

Since Kotlin 1.5

actual inline fun Char.isTitleCase(): Boolean

Returns true if this character is a title case letter.

Since Kotlin 1.0

actual fun Char.isTitleCase(): Boolean

Returns true if this character is a title case letter.

Since Kotlin 1.5

isUpperCase

expect fun Char.isUpperCase(): Boolean

Returns true if this character is upper case.

Since Kotlin 1.5

actual fun Char.isUpperCase(): Boolean

Returns true if this character is upper case.

Since Kotlin 1.5

actual inline fun Char.isUpperCase(): Boolean

Returns true if this character is upper case.

Since Kotlin 1.0

actual fun Char.isUpperCase(): Boolean

Returns true if this character is upper case.

Since Kotlin 1.3

isWhitespace

expect fun Char.isWhitespace(): Boolean

Determines whether a character is whitespace according to the Unicode standard. Returns true if the character is whitespace.

Since Kotlin 1.0

actual fun Char.isWhitespace(): Boolean

Determines whether a character is whitespace according to the Unicode standard. Returns true if the character is whitespace.

Since Kotlin 1.1

actual fun Char.isWhitespace(): Boolean

Determines whether a character is whitespace according to the Unicode standard. Returns true if the character is whitespace.

Since Kotlin 1.0

actual fun Char.isWhitespace(): Boolean

Determines whether a character is whitespace according to the Unicode standard. Returns true if the character is whitespace.

Since Kotlin 1.3

lowercase

expect fun Char.lowercase(): String

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.lowercase(): String

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.lowercase(): String

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

fun Char.lowercase(locale: Locale): String

Converts this character to lower case using Unicode mapping rules of the specified locale.

Since Kotlin 1.5

actual fun Char.lowercase(): String

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

lowercaseChar

expect fun Char.lowercaseChar(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.lowercaseChar(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.lowercaseChar(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual fun Char.lowercaseChar(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

minus

operator fun minus(other: Char): Int

Subtracts the other Char value from this value resulting an Int.

Since Kotlin 1.0

operator fun minus(other: Int): Char

Subtracts the other Int value from this value resulting a Char.

Since Kotlin 1.0

inline operator fun minus(other: Char): Int

Subtracts the other Char value from this value resulting an Int.

Since Kotlin 1.3

inline operator fun minus(other: Int): Char

Subtracts the other Int value from this value resulting a Char.

Since Kotlin 1.3

plus

operator fun plus(other: Int): Char

Adds the other Int value to this value resulting a Char.

Since Kotlin 1.0

inline operator fun plus(other: Int): Char

Adds the other Int value to this value resulting a Char.

Since Kotlin 1.3

plus

inline operator fun Char.plus(other: String): String

Concatenates this Char and a String.

Since Kotlin 1.0

rangeTo

operator fun rangeTo(other: Char): CharRange

Creates a range from this value to the specified other value.

Since Kotlin 1.0

operator fun rangeTo(other: Char): CharRange

Creates a range from this value to the specified other value.

Since Kotlin 1.3

rangeUntil

@ExperimentalStdlibApi

inline operator fun Char.rangeUntil(to: Char): CharRange

Returns a range from this value up to but excluding the specified to value.

Since Kotlin 1.7

titlecase

fun Char.titlecase(): String

Converts this character to title case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

fun Char.titlecase(locale: Locale): String

Converts this character to title case using Unicode mapping rules of the specified locale.

Since Kotlin 1.5

titlecaseChar

expect fun Char.titlecaseChar(): Char

Converts this character to title case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual fun Char.titlecaseChar(): Char

Converts this character to title case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.titlecaseChar(): Char

Converts this character to title case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual fun Char.titlecaseChar(): Char

Converts this character to title case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

toByte

fun ~~toByte~~(): Byte

Returns the value of this character as a Byte.

Since Kotlin 1.0

external fun ~~toByte~~(): Byte

Returns the value of this character as a Byte.

Since Kotlin 1.3

toChar

fun toChar(): Char

Returns the value of this character as a Char.

Since Kotlin 1.0

inline fun toChar(): Char

Returns the value of this character as a Char.

Since Kotlin 1.3

toDouble

fun ~~toDouble~~(): Double

Returns the value of this character as a Double.

Since Kotlin 1.0

external fun ~~toDouble~~(): Double

Returns the value of this character as a Double.

Since Kotlin 1.3

toFloat

fun ~~toFloat~~(): Float

Returns the value of this character as a Float.

Since Kotlin 1.0

external fun ~~toFloat~~(): Float

Returns the value of this character as a Float.

Since Kotlin 1.3

toInt

fun ~~toInt~~(): Int

Returns the value of this character as a Int.

Since Kotlin 1.0

external fun ~~toInt~~(): Int

Returns the value of this character as a Int.

Since Kotlin 1.3

toLong

fun ~~toLong~~(): Long

Returns the value of this character as a Long.

Since Kotlin 1.0

external fun ~~toLong~~(): Long

Returns the value of this character as a Long.

Since Kotlin 1.3

toLowerCase

expect fun Char.~~toLowerCase~~(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.0

actual inline fun Char.~~toLowerCase~~(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.1

actual inline fun Char.~~toLowerCase~~(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.0

actual fun Char.~~toLowerCase~~(): Char

Converts this character to lower case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.3

toShort

fun ~~toShort~~(): Short

Returns the value of this character as a Short.

Since Kotlin 1.0

external fun ~~toShort~~(): Short

Returns the value of this character as a Short.

Since Kotlin 1.3

toString

open override fun toString(): String

Since Kotlin 1.0

open external override fun toString(): String

Since Kotlin 1.3

toTitleCase

inline fun Char.~~toTitleCase~~(): Char

Converts this character to title case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.0

toUpperCase

expect fun Char.~~toUpperCase~~(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.0

actual inline fun Char.~~toUpperCase~~(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.1

actual inline fun Char.~~toUpperCase~~(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.0

actual fun Char.~~toUpperCase~~(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.3

until

infix fun Char.until(to: Char): CharRange

Returns a range from this value up to but excluding the specified to value.

Since Kotlin 1.0

uppercase

expect fun Char.uppercase(): String

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.uppercase(): String

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.uppercase(): String

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

fun Char.uppercase(locale: Locale): String

Converts this character to upper case using Unicode mapping rules of the specified locale.

Since Kotlin 1.5

actual fun Char.uppercase(): String

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

uppercaseChar

expect fun Char.uppercaseChar(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual fun Char.uppercaseChar(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual inline fun Char.uppercaseChar(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

actual fun Char.uppercaseChar(): Char

Converts this character to upper case using Unicode mapping rules of the invariant locale.

Since Kotlin 1.5

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