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Version: 3.13.0

Math.sign()

The Math.sign() function returns 1 or -1, indicating the sign of the number passed as argument. If the input is 0 or -0, it will be returned as-is.

Syntax​

Math.sign(x)

Parameters​

  • x
    • : A number.

Return value​

A number representing the sign of x:

  • If x is positive, returns 1.
  • If x is negative, returns -1.
  • If x is positive zero, returns 0.
  • If x is negative zero, returns -0.
  • Otherwise, returns NaN.

Description​

Because sign() is a static method of Math, you always use it as Math.sign(), rather than as a method of a Math object you created (Math is not a constructor).