Sometimes working out the details what is the right output of a piece of code (like, in the line x = f(15), is x 2345 or 2346?) is very time consuming It's als

Sometimes working out the details what is the right output of a piece of code (like, in the line x = f(15), is x 2345 or 2346?) is very time consuming It's also sometimes unnecessary to understand the high level picture of what the code does (like "oh, this computes the GCD using Euclidean algorithm, I had to code this in uni once") So, most people read in a higher level fashion and understand just fine. It's really like reading math. When you read 23443 + 54454 * 454534, do you need to work out the computation to understand what this does?