Musa's Calculator assignment

#include <stdio.h>

int add(int a, int b) {
    return a + b;
}

int sub(int a, int b) {
    return a - b;
}

int mul(int a, int b) {

    return a * b;
}

float div(int a, int b) {
    return a / b;
}

int mod(int a, int b) {
    return a % b;
}

int power(int a, int b) {
    int res = 1;
    while (b != 0) {
        res *= a;
        b--;
    }
    return res;
}

int main() {
    int a, b, choice, result;
    while (true) {
        printf("1. Addition\n");
        printf("2. Subtraction\n");
        printf("3. Multiplicaton\n");
        printf("4. Division\n");
        printf("5. Modulus\n");
        printf("6. Power\n");
        printf("7. Exit\n");
        printf("Enter Your choice: ");
        scanf("%d", &choice);
        if (choice == 1) {
            printf("Enter two numbers: ");
            scanf("%d %d", &a, &b);
            result = add(a, b);
            printf("%d\n", result);
        } else if (choice == 2) {
            printf("Enter two numbers: ");
            scanf("%d %d", &a, &b);
            result = sub(a, b);
            printf("%d\n", result);
        } else if (choice == 3) {
            printf("Enter two numbers: ");
            scanf("%d %d", &a, &b);
            result = mul(a, b);
            printf("%d\n", result);
        } else if (choice == 4) {
            printf("Enter two numbers: ");
            scanf("%d %d", &a, &b);
            if (b != 0) {
                result = div(a, b);
                printf("%d\n", result);
            } else {
                printf("Divide by zero is not possible!\n");
            }
        } else if (choice == 5) {
            printf("Enter two numbers: ");
            scanf("%d %d", &a, &b);
            result = mod(a, b);
            printf("%d\n", result);
        } else if (choice == 6) {
            printf("Enter two numbers: ");
            scanf("%d %d", &a, &b);
            result = power(a, b);
            printf("%d\n", result);
        } else if(choice == 7) {
            break;
        }
    }
}