What are i++ or ++i or i-- or --i in programming language?? Why you should use them?

In our programming learning, we frequently use the i++ or ++i, i-- or --i.

Sometimes, it is pretty tricky to understand why we use them and how they actually work in different perspective.

However, I have discussed everything in a video.

📹 Make sure to watch it to understand better.

Let me also clarify what we call those 4 specific things:

• i++: Post increment
• ++i: Pre increment
• i--: Post decrement
• --i: Pre decrement

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Comments

[Phil Ashby]

Typo :) "--i: pre-increment" should probably say pre decrement.

It's interesting to note that some popular languages do not support these operators for safety reasons, notably: Python & Rust.

Personally I try to avoid these operators unless I need the result of the expression and it's an idiomatic form eg in C: *p++ = val; particularly in the third term of a for loop, where I prefer val += 1 which is more portable.

[Md. Fahim Bin Amin]

Thank you so much for the correction. I did a mistake there for having a rush! Silly me 😅

That's also true, but we tend to use that in Java, C/C++ a lot to be honest.