Postfix and Prefix Operators table

Operation                                                 Operator    Class     Example               
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Preincrement:
Increment operand by one before the variable is used.     ++          Prefix    ++$a

Postincrement:
Increment operand by one after the variable is used.      ++          Postfix   $a++

Predecrement:
Decrement operator by one before the variable is used.    --          Prefix    --$a

Postdecrement:
Decrement operand by one after the variable is used.      --          Postfix   $a--