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Program to count leading zeros in a binary number using while loop



Program to count leading zeros in a binary number using while loop

Write a C program to input any number from user and find total number of leading zeros of the given number. How to find total leading zeros of a given number (in binary representation) using bitwise operator in C programming. Logic to count total leading zeros of a given number using C programming.

#include <stdio.h>
#include <limits.h> // Used for INT_MAX

int main()
{
    int j, count;

    /* Input number from user */
    printf("Enter any number: ");
    scanf("%d", &j);

    count = 0;
    while(!(j & (~INT_MAX)))
    {
        count++;
        j <<= 1;
    }

    printf("Total number of leading zeros = %d", count);

    return 0;
}

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