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Write a program to check an integer is a power of 2?

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YasminRadwan26

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2022-06-24

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Write a program to check an integer is a power of 2?

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YasminRadwan26

2022-06-24

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Here, I am writing a small algorithm to check the power of 2. If a number is a power of 2, the flag will be 1.

#include <stdio.h>
int main()
{
    int flag = 0;
    int data = 0;
    printf("Enter the number ");
    scanf("%d",&data); //Get the number
    flag = ((data != 0) && !(data & (data - 1))); // check the power of 2
    if(flag == 1)
    {
        printf("Number is a power of 2 \n");
    }
    else
    {
        printf("Enter number is not power of 2 \n");
    }
    return 0;
}

Note: Here I assume that bit of register starts with 0th position, it means the 2nd position is actually 3rd bits.

D7

D6

D5

D4

D3

D2

D1

D0

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