How do I solve this

Hi Micheal,

The issue here is that you used the "var" keyword too many times. You just need it when you initialize a variable the first time, so that the memory knows that it has to store a new variable. When you call this variable again, the variable object is already in memory, so there's no need to initialize it again, as the memory will think you want to create a new variable with the same name, instead of updating its value.

Also, you omitted a semicolon after the statement in the loop, so that JavaScript struggles to understand where do the statement ends. The same way, in a for loop, the semicolon is used to separate initialization, condition and final expression of the counter variable (here i). You don't need it after the final expression where you increment the variable i by 1.

Try this instead :

for (var i = 4; i <= 156; i += 1) {
  console.log(i);
}

I hope my answer is clear, as it is the first time I answer on the Treehouse forum :)

thanks!