Question

Difference between the increment and Decrement operator.

Answer 1

• Increment Operator (++):

1. The ++ operator increments its single operand.
2. The operator converts its operand to a number, adds 1 to that number and assigns the incremented value back into the variable.
3.  When ++ is used before the operand, where it is known as the pre-increment operator. When used after the operand, where it is known as the post-increment operator.
   • Eg: var m = 1, n= ++m;
   • var m = 1, n = m++;

• Decrement Operator (–):

1. The – – operator decrement its single operand.
2. It converts the value of the operand to a number subtracts 1 and assigns the decremented value back to the operand.
3. When ++ is used before the operand, it decrements the value. When used after the operand, it decrements the operand but returns the undecremented value.
   • Eg: var m = 2, n = -m;
   • var m = 2, n= m –;