No.chetzread said:
num = 10;
ans = num++;
Because it makes compact code; needs fewer variables, and saves lines.chetzread said:
a++ and a–– is postfix ( 'post' means after)chetzread said:
Yes, the notes are wrong. The title of the slide is "Results of Post-fix Increment" -- it should say "Results of Pre-fix Increment". The relevant assignment is x = ++a, which is a pre-fix increment.chetzread said:
Prefix increment (i.e. ++x) increments the value of a variable before using it in an operation, while postfix increment (i.e. x++) uses the original value of the variable in the operation and then increments it.
This depends on the specific needs of your code. Generally, prefix increment is more efficient because it avoids creating a temporary variable, but postfix increment may be more readable in certain situations. Consider the context and choose the one that makes the most sense.
No, prefix and postfix increment operators can only be used with numeric variables. Attempting to use them with non-numeric variables will result in an error.
Yes, there are also prefix and postfix decrement operators (i.e. --x and x--) which decrease the value of a variable by 1. These work in the same way as prefix and postfix increment, but in the opposite direction.
Yes, prefix and postfix increment operators can be used within an expression as long as they are not the only operator. For example, you can use x = y++ * 2, but not x = ++y.
