Skip to main content
Version: 3.35.1

Math.clz32()

The Math.clz32() function returns the number of leading zero bits in the 32-bit binary representation of a number.

Syntax​

Math.clz32(x)

Parameters​

  • x
    • : A number.

Return value​

The number of leading zero bits in the 32-bit binary representation of x.

Description​

clz32 is short for CountLeadingZeros32.

If x is not a number, it will be converted to a number first, then converted to a 32-bit unsigned integer.

If the converted 32-bit unsigned integer is 0, 32 is returned, because all bits are 0. If the most significant bit is 1 (i.e. the number is greater than or equal to 231), 0 is returned.

This function is particularly useful for systems that compile to JS, like Emscripten.