Platform and version requirements: JVM (1.2), JS (1.2), Native (1.2)

fun sign(x: Double): Double

fun sign(x: Float): Float

Returns the sign of the given value x:

• -1.0 if the value is negative,
• zero if the value is zero,
• 1.0 if the value is positive

Special case:

• sign(NaN) is NaN

Platform and version requirements: Native (1.2)

val Double.sign: Double

Platform and version requirements: JVM (1.2), JS (1.2)

inline val Double.sign: Double

Platform and version requirements: Native (1.2)

val Float.sign: Float

Platform and version requirements: JVM (1.2), JS (1.2)

inline val Float.sign: Float

Returns the sign of this value:

• -1.0 if the value is negative,
• zero if the value is zero,
• 1.0 if the value is positive

Special case:

• NaN.sign is NaN

Platform and version requirements: JVM (1.2), JS (1.2), Native (1.2)

val Int.sign: Int

val Long.sign: Int

Returns the sign of this value:

• -1 if the value is negative,
• 0 if the value is zero,
• 1 if the value is positive