Description:

• This function counts the number of leading zeros in the binary representation of an integer.

Syntax:

int __builtin_clz(unsigned int x);

Example:

#include <iostream>

int main() {
    unsigned int x = 16; // Binary: 00000000000000000000000000010000
    int leading_zeros = __builtin_clz(x);
    std::cout << "Number of leading zeros in " << x << " is " << leading_zeros << std::endl; // Output: 27

    return 0;
}