Yeah thanosxx, every symbol in code must be exact. Much of the time spent debugging code is finding mistypes. With practice you get faster and you make fewer of these kind of errors but only on very simple code does everything go right first time.
You are okay, this happens to us all. The way you learn to think is closer to algebra than spoken words where close is enough. With spoken words the listener has a mind, with computer code there is only a machine to set up to run.