#include <stdio.h>
 
int main(void) {
    volatile unsigned int temp = 10;
 
    if( temp == 10 )
    {
        temp = 30;
    }
 
	// sometimes you may use assignment operator instead of comparision.
	// this may not generate any warning and can result in nasty rutime issue.
	// below if condition is always.
    if( temp = 10 )
    {
        temp = 40;
    }
 
    printf("value of temp : %d \n", temp );
}