I remember a few years back I was able to do this easily. Being able to run a single line of code with each click made it very easy to find out where the mistakes in my code were. I just started again with Scratch for the first time in several years and I can't seem to find how to do this. Was this feature removed or am I simply missing how to do this? Thank you.

You could always single out the code by moving the blocks under it and then moving that block out so you can perform a single action.

Single Stepping was in Scratch 1.4 and has long been removed: https://en.scratch-wiki.info/wiki/Single_Stepping

Does anyone know how to make a line of code that can only be used once?

TrueWolfGod21 wrote:

Does anyone know how to make a line of code that can only be used once?

Use a variable. Once the code runs, change the variable value to something else.
An if block allows you to determine if the code should run.

if <(var) = [0]> then
... // run code
set [var v] to [1] // now the above code can't run again, var is now 1.
end

I'm fairly certain stepping isn't a thing in base Scratch since the extension I use allows me to toggle it.

TrueWolfGod21 wrote:

Does anyone know how to make a line of code that can only be used once?

This was from 3 years ago, but you can just use a variable to detect if it has been ran, like here:

The_Game_ wrote:

I'm fairly certain stepping isn't a thing in base Scratch since the extension I use allows me to toggle it.

It was, but it got replaced with Turbo Mode.

medians wrote:

TrueWolfGod21 wrote:

Does anyone know how to make a line of code that can only be used once?

This was from 3 years ago, but you can just use a variable to detect if it has been ran, like here:

Oh, * didn't realise. Saw the 202 and assumed it was today. Oops.

TrueWolfGod21 wrote:

Does anyone know how to make a line of code that can only be used once?

Do not necropost. Make a new thread instead.