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Switch Case Exercises

1. Write a JavaScript function for basic arithmetic computations. The function should accept two numbers and an operator and should return the computed value. If the operator is not included in the allowed values, return Invalid operator. Hint: "operator" will be compared to each case

Parameters:
x - any number
y - any number
operator - one of the arithmetic operators:
        + (addition)
        - (subtraction)
        * or x or X (multiplication)
        / (division)

function compute(x,y,operator) {
    // your code here
}

console.log(compute(1,6,"*")) //6
console.log(compute(1,6,"%")) //Invalid operator
Solution 

function compute(x,y,operator) {
    let answer;
    // checking if x and y are numbers is optional
    if(isNaN(x) || isNaN(y)) {
        return "Invalid number";
    }

    switch (operator) {
        case "+":
            answer = x + y;
            break;
        case "-":
            answer = x - y;
            break;
        case "*":
        case "x":
        case "X":
            answer = x * y;
            break;
        case "/":
            answer = x / y;
            break;
        default:
            answer = "Invalid operator";
    }
    return answer;
}

console.log(compute(1,6,"*")); //6