! (logical NOT) / Reference / Processing.org

Name

! (logical NOT)

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.

Examples

```
size(400, 400);
boolean a = false;
if (!a) {
  rect(120, 80, 200, 200);
}
if (a) {
  line(80, 40, 360, 320);
  line(80, 320, 360, 40);
}
```
```
size(400, 400);
boolean a = true;
if (!a) {
  rect(120, 80, 200, 200);
}
if (a) {
  line(80, 40, 360, 320);
  line(80, 320, 360, 40);
}
```