JavaScript Math clz32()

The clz32() method converts the specified number into 32-bit binary representation and returns the number of leading zero bits.

Example

// converts 5 to 00000000 00000000 00000000 00000101
// returns the leading 0 bits
let value = Math.clz32(5);
console.log(value); 

// Output: 29  

clz32() Syntax

The syntax of the Math.clz32() method is:

Math.clz32(number)

Here, clz32() is a static method. Hence, we are accessing the method using the class name, Math.


clz32() Parameter

The Math.clz32() method takes in a single parameter:

  • number - value whose leading zero bits is to be calculated (in 32-bit representation)

clz32() Return Value

The clz32() method returns:

  • number of 0 bits 32-bit binary representation of the number

Example 1: JavaScript Math.clz32()

// leading zero bits of 0 let value1 = Math.clz32(2);
console.log(value1);
// leading zero bits of 100 let value2= Math.clz32(210);
console.log(value2);
// leading zero bits of 1000 let value3 = Math.clz32(1200);
console.log(value3); // Output: // 30 // 24 // 21

Here, Math.clz32() converts the specified number into its 32-bit binary representation and counts the leading 0.

1. Math.clz32(2)

  • 32-bit representation: 00000000 00000000 00000000 00000010
  • Number of leading zero: 30

2. Math.clz(210)

  • 32-bit representation: 00000000 00000000 00000000 11010010
  • Number of leading zero: 24

3. Math.clz(1200)

  • 32-bit representation: 00000000 00000000 00000100 10110000
  • Number of leading zero: 21

Example 2: Math.clz32() with Boolean Values

// clz32() with boolean value - true let value1 = Math.clz32(true);
console.log(value1);
// clz32() with boolean value - false let value2 = Math.clz32(false);
console.log(value2); // Output: // 31 // 32

Here, we have used the clz32() method with boolean values. JavaScript treats boolean values true as 1 and false as 0.

So, the method calculates the leading zero bits for value 1 and 0 respectively.


Example 3: Math.clz32() with a Non-Numeric Argument

// leading 0 bits of a string let value = Math.clz32("Harry");
console.log(value); // Output: 32

In the above example, we have tried to count the leading zeroes of the string "Harry".

clz32() will first convert the string "Harry" to its corresponding 32-bit binary format and treat it as a 0.

Hence, we get 32 as the output.


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