Reference for Processing version 1.5. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.

Name

### while

Examples

    int i=0;
    while(i<80) {
      line(30, i, 80, i);
      i = i + 5;
    }

Description

Controls a sequence of repetitions. The while structure executes a series of statements continuously while the expression is true. The expression must be updated during the repetitions or the program will never "break out" of while.
This function can be dangerous because the code inside the while() loop will not finish until the expression inside while() becomes true. It will lock out all other code from running (mouse events will not be updated, etc.) So be careful because this can lock up your code (and sometimes even the Processing environment itself) if used incorrectly.

Syntax

    while (expression) {
      statements
    }

Parameters

expression | a valid expression
statements | one or more statements

Usage | Web & Application
Related | for

Updated on August 30, 2010 04:29:39pm EDT