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function add(a, b) {
    return a + b;
}
var x = add(1, 2);

function total() {
    return x;
}
console.log(total()); // 3

/*
OR
*/

function complete() {
    return add(1, 2);
}
console.log(complete()); // 3

function greeting() {
    console.log("Hi");
}
greeting(); // Hi

function greetingOne() {
    greeting();
}
greetingOne(); // Hi