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Reference for Processing version 1.0.1+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name

### for

Examples

    for (int i = 0; i < 40; i = i+1) {
      line(30, i, 80, i);
    }

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

    for (int i = 40; i < 80; i = i+5) {
      line(30, i, 80, i);
    }

    for (int i = 30; i < 80; i = i+5) {
      for (int j = 0; j < 80; j = j+5) {
        point(i, j);
      }
    }

Description

Controls a sequence of repetitions. A for structure has three parts: init, test, and update. Each part must be separated by a semi-colon ";". The loop continues until the test evaluates to false. When a for structure is executed, the following sequence of events occurs:
1. The init statement is executed
2. The test is evaluated to be true or false
3. If the test is true, jump to step 4. If the test is False, jump to step 6
4. Execute the statements within the block
5. Execute the update statement and jump to step 2
6. Exit the loop.

Syntax

    for (init; test; update) {
      statements
    }

Parameters

init | statement executed once when beginning loop
test | if the test evaluates to true, the statements execute
update | executes at the end of each iteration
statements | collection of statements executed each time through the loop

Usage | Web & Application
Related | while

Updated on November 22, 2008 08:39:25pm PST