[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'System' (#rtl)

# Inc

Increase value of integer variable

## Declaration

Source position: line 0

`procedure Inc(`
`var X: TOrdinal`
`); procedure Inc(`
`var X: TOrdinal;`
`Increment: TOrdinal`
`);`

## Description

Inc increases the value of X with Increment. If Increment isn't specified, then 1 is taken as a default.

## Errors

If range checking is on, then A range check can occur, or an overflow error, when an attempt is made to increase X over its maximum value.

## See also

Dec |  | Decrease value of variable

## Example

    Program Example32;

    { Program to demonstrate the Inc function. }

    Const
      C : Cardinal  = 1;
      L : Longint   = 1;
      I : Integer   = 1;
      W : Word      = 1;
      B : Byte      = 1;
      SI : ShortInt = 1;
      CH : Char     = 'A';

    begin
      Inc (C);     { C:=2    }
      Inc (L,5);   { L:=6    }
      Inc (I,-3);  { I:=-2   }
      Inc (W,3);   { W:=4    }
      Inc (B,100); { B:=101  }
      Inc (SI,-3); { Si:=-2  }
      Inc (CH,1);  { ch:='B' }
    end.

Documentation generated on: Feb 26 2014