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How to clear a particular bit in C?

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YasminRadwan26

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2022-06-24

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How to clear a particular bit in C?

C programming, Interview questions, C programming Interview-questions,

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YasminRadwan26

2022-06-24

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Bitwise AND operator (&) use to clear a bit of integral data type. “AND” of two bits is always zero if any one of them is zero.

An algorithm to clear the bits

Number &= ~ (1<< nth Position)
To clear the nth bit, first, you need to invert the string of bits then AND it with the number.

A simple program to clear a bit:

#include <stdio.h>
int main(int argc, char *argv[])
{
    unsigned char cData=0xFF;
    int iPos =0;
    printf("Initially cData = 0x%x\n\n",cData);
    printf("Enter the position which you want clear = ");
    scanf("%d",&iPos);
    //clear the nth bit.
    cData &= ~(1<<iPos);
    //Print the data
    printf("\n\n%dth Bit clear Now cData will be = 0x%x\n",iPos,cData);
    return 0;
}

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