For (int x=1;x<5, x++){cout<<x;}

Question

Whats is the output?
And if the increment bcome ++x what is the new output?
Help please for a better understanding

Answer 1

Here you find some examples:
https://www.sololearn.com/learn/CPlusPlus/1610/?ref=app

Answer 2

Once again, Code Playground has the answer.

Answer 3

Prefix: increments the value, and then proceeds with the expression.
Postfix: evaluates the expression and then performs the incrementing.