Question

How to check if the least significant bit (LSB) of a number is set or not in C

Answer 1

#include <stdio.h>
  
int main()
{
    int n = 15; // binary: 1111
  
    if (n & 1) // Method 1
        printf("LSB set (1)\n");
    else
        printf("LSB not set (0)\n");
        
    if (n % 2 == 1) // Method 2
        printf("LSB set (1)\n");
    else
        printf("LSB not set (0)\n");
          
    n = 4;   
    if (n & 1)
        printf("LSB set (1)\n");
    else
        printf("LSB not set (0)\n");
  
    return 0;
}
  
  
  
/*
run:
  
LSB set (1)
LSB set (1)
LSB not set (0)
  
*/

 

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