04. metricConverter -Conditional Statements - Exercise

function metricConverter(input) {
    let num = Number(input.shift());
    let type1 = input.shift();
    let type2 = input.shift();

    if (type1 == "mm") {
        num /= 1000;
    } else if (type1 == "cm"){
        num /= 100;
    }
    if (type2 == "mm"){
        num *= 1000;
    } else if (type2 == "cm"){
        num *= 100;
    }
    console.log(num.toFixed(3));
}