Functions

A function names reusable work and can return a computed value.

functions.c

#include <stdio.h>

int addTax(int price) {
    return price + price / 10;
}

int main(void) {
    int price = ;
    int total = addTax(price);
    printf("total=%d\n", total);
    return 0;
}

#include <stdio.h>

int addTax(int price) {
    return price + price / 10;
}

int main(void) {
    int price = ;
    int total = addTax(price);
    printf("total=%d\n", total);
    return 0;
}

#include <stdio.h>

int addTax(int price) {
    return price + price / 10;
}

int main(void) {
    int price = ;
    int total = addTax(price);
    printf("total=%d\n", total);
    return 0;
}

parameter A parameter receives the value passed by the caller.

return `return` sends a value back to the caller.