Reverse a String Algorithm

Reverse a String Algorithm
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Tell us what’s happening:

how is posible that writing these piece of code function reverseString(str) {
return str.split(’’).reverse().join(’’);
} you get the test right taking into account that in any moment you write the variables : “hello”, and “Greetings from Earth”. I mean we shouldn´t store these variable first?.

thank you guys.

Your code so far

function reverseString(str) {
  return str;


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Link to the challenge:


“hello” and “Greetings from Earth” are string values. You can pass any value into a function. The line reverseString(“hello”) is a call to the function reverseString with the string “hello” as an argument.

What you may be confusing is the fact that when you declare a function (like below), the functionParameterName is a variable and can only be a variable, because it is a placeholder for when you pass in a value to it.

function myFunction (functionParameterName) {
 // do some stuff