3. Check if K-th Bit is Set

#include <stdio.h>

int isKthBitSet(int n, int k) {
    // Write your code here
    return(n & (1 << k )?1:0);
    
}

int main() {
    int n, k;
    scanf("%d %d", &n, &k);
    printf("%d", isKthBitSet(n, k));
    return 0;
}

return (n & (1 << k)) ? 1 : 0;

This line return  1 if that particular bit is set to 1 or else it returns 0