Functions

Return Values

Return types describe the value a function sends back to its caller.

Return Values

returns.ts 
function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);

function rectangleArea(width: number, height: number): number {
    const area: number = width * height;
    return area;
}

const width: number = ;
const height: number = ;
const area: number = rectangleArea(width, height);

console.log(`area=${area}`);
return type The annotation after the parameter list tells TypeScript what a function returns.