sinon si déclaration en c

// C program to illustrate nested-if statement
#include <stdio.h>
 
int main() {
    int i = 20;
  
    if (i == 10)
        printf("i is 10");
    else if (i == 15)
        printf("i is 15");
    else if (i == 20)
        printf("i is 20");
    else
        printf("i is not present");
}
sammiie