figureAreaV1

function figureArea(input) {
//Input
    let figure = input.shift();
    let n = Number(input.shift());
    let n2 = Number(input.shift());

//Calculations

//Rectangle - w * h
if (figure == 'rectangle') {
    let rectangleArea = (n * n2).toFixed(3);
    console.log(rectangleArea);
}
//Square - x * x
else if (figure == 'square') {
    let squareArea = (Math.pow(n, 2)).toFixed(3);
    console.log(squareArea);
}
//Circle - PI * r * r
else if (figure == 'circle') {
    let circleArea = (Math.PI * Math.pow(n, 2)).toFixed(3);
    console.log(circleArea);
}
//Triangle - b * h / 2
else if (figure == 'triangle') {
    let triangleArea = (n * n2 / 2).toFixed(3);
    console.log(triangleArea);
    }
}

figureArea([
    'square',
    5,
]);