This C Program checks if a given integer is a power of 2 without using bitwise.

Here is source code of the C Program to check if a given integer is a power of 2 without using bitwise. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

`/*`

`* C Program to Check if a given Integer is a Power of 2 without using Bitwise`

`*/`

`#include <stdio.h>`

`/* function prototype */`

int power_of_2(unsigned int);

`/* gloabal variables */`

int b[32] = {0}, j = 0, n, i, count = 0;

void main()

`{`

unsigned int num;

printf("enter value\n");

scanf("%d", &num);

power_of_2(num);

if (count == 1)

printf("YES\n");

`else`

printf("NO\n");

`}`

`/* function to check whether a given number is power of 2 or not */`

int power_of_2(unsigned int num)

`{`

while (num != 0)

`{`

n = num % 2;

if (n == 1)

`count++;`

num = num / 2;

`}`

`}`

$ cc bit26.c $ a.out enter value 128 YES $ a.out enter value 126 NO

**Sanfoundry Global Education & Learning Series – 1000 C Programs.**

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