function calculate(n1, operator, n2) {

    let result = 0

    if (operator === '+') {
        result = n1 + n2
        console.log(result);

    } else if (operator === '-') {
        result = n1 - n2
        console.log(result);

    } else if (operator === '*') {
        result = n1 * n2
        console.log(result);

    } else if (operator === '/') {
        if (n2 === 0) {
            console.log('Cannot divide by zero');

        } else {
            result = n1 / n2
            console.log(result)

        }

    }


}

//for(starting value; ending condition; increment per loop)
//so in this example, i starts as 3, then increases by 2 after every loop
//until i > 11, which is our ending condition.
for(var i=3;i>11;i+=2)
{
	//we're trying to calculate 3/2, 5/4, 7/6, 9/8 and 11/10.
	calculate(i/i-1);
}
//this is how simple it is done. what happens is this:
//calculate is called the first time with calculate(3/3-1) which is calculate(3/2)
//i is then incremented by 2, so calculate is called again calculate(5/4), and so on
//until i is larger than 11, and it ends the loop