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How to check if a particular bit is set in C?

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YasminRadwan26

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2022-06-25

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How to check if a particular bit is set in C?

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YasminRadwan26

2022-06-25

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To check the nth bit, shift the ‘1’ nth position toward the left and then “AND” it with the number.

An algorithm to check the bits

Bit = Number & (1 << nth)

A simple program to check a bit:

#include <stdio.h>
int main(int argc, char *argv[])
{
    unsigned char cData=0xFc;
    int iPos =0;
    printf("Initially cData = 0x%x\n\n",cData);
    printf("Enter the position which you want check = ");
    scanf("%d",&iPos);
    if(cData & (1<<iPos))   //Check bit set or not
    {
        printf("\n\nBit is One\n");
    }
    else
    {
        printf("\n\nBit is zero\n");
    }
    return 0;
}

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