Difference between pre and post Increment/Decrement Operator in C++

 

Increment and Decrement Operator:

Both the increment and decrement operators can either precede (prefix) or follow (postfix) the operand. 

 pre-increment:

         ++number

 post-increment:

        number++

pre-decrement:

        --number

post-decrement:

        number--

Difference between pre and post Increment/Decrement Operator:

• When an increment or decrement is used as part of an expression, there is an important difference in prefix and postfix forms.
• If you are using prefix form then increment or decrement will be done before rest of the expression 
• and if you are using postfix form, then increment or decrement will be done after the complete expression is evaluated 

Increment and Decrement Floating-Point Variables:

• You can also apply the prefix and postfix increment and decrement operators, ++ and --, to a floating-point variable with essentially the same effect as for an integer;
• The variable will be incremented or decremented by 1.0.