Javascript Math clz32()

Introduction

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

clz32 is short for Count Leading Zeroes 32. 

Math.clz32(x)   // x is a number.

If x is not a number, then 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, then return 32, because all bits are 0. 

let a = Math.clz32(1);           
console.log(a);/*from   www  . ja v  a 2  s . c o m*/
a = Math.clz32(1234);        
console.log(a);
a = Math.clz32();  
console.log(a);          
a = Math.clz32(true);        
console.log(a);
a = Math.clz32(3.5);         
console.log(a);
a = 32776;   // 00000000000000001000000000001000 (16 leading zeros)
Math.clz32(a);   // 16
a = ~32776;  // 11111111111111110111111111110111 (32776 inversed, 0 leading zeros)
Math.clz32(a);   // 0 (this is equal to how many leading one's there are in a)



PreviousNext

Related