Week 1 Exercise 3.1 Function to return the absolute value of a number

Ex 3.1

My attempt to create a function that returns an absolute value of a number. I created an if else statement. If the argument is greater than 0, you return the value. Otherwise, multiply the number with -1 and return that value.

function absolute (a) {

  if (a > 0) {

    return a;

  }

  else {

    a = -1*a;

    return a;

  }

}