The increment operator (++) increments its operand by 1. The increment operator can appear before or after its operand:

++ var
var ++

Where:

var

An expression that denotes a storage location or a property or an indexer.

Remarks

The first form is a prefix increment operation. The result of the operation is the value of the operand after it has been incremented.

The second form is a postfix increment operation. The result of the operation is the value of the operand before it has been incremented.

Numeric and enumeration types have predefined increment operators. User-defined types can overload the ++ operator (see operator).

Example

// cs_operator_increment.cs
using System;
class Test 
{
   public static void Main() 
   {
      double x;
      x = 1.5;
      Console.WriteLine(++x);
      x = 1.5;
      Console.WriteLine(x++);
      Console.WriteLine(x);
   }
}

Output

2.5
1.5
2.5

See Also

C# Operators | 7.5.9 Postfix increment and decrement operators | 7.6.5 Prefix increment and decrement operators