| Language \ Environment \ Comparison |

| Index

| The Processing 1.0 _ALPHA_ Reference is a work in progress. If you see any errors or have any comments, please write to: reas at groupc.net

Name |  | ### ! (logical NOT)
Examples |  |
    boolean a = false;
    if (!a) {
      rect(30, 20, 50, 50);
    }
    a = true;
    if (a) {
      line(20, 10, 90, 80);
      line(20, 80, 90, 10);
    }
Description |  | Inverts the Boolean value of an expression. Returns true if the expression is false and returns false if the expression is true. If the expression (a>b) evaluates to true, then !(a>b) evaluates to false.
Syntax |  |
    !expression
Parameters |  |
expression |  | any valid expression
Usage |  | Web & Application
Related |  | || (logical OR) && (logical AND) if()

| © 2004 - 2001 Massachusetts Institute of Technology and Interaction Design Institute Ivrea |
| Processing is an open project initiated by Ben Fry and Casey Reas |