how to use addition in c

1#include <stdio.h>
2int main() {    
3
4    int number1, number2, sum;
5    
6    printf("Enter two integers: ");
7    scanf("%d %d", &number1, &number2);
8
9    // calculating sum
10    sum = number1 + number2;      
11    
12    printf("%d + %d = %d", number1, number2, sum);
13    return 0;
14}
15