This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.



example pic
for (int i = 5; i < height; i += 5) {
  stroke(255);   // Set the color to white
  if (i < 35) {  // When 'i' is less than 35...
    stroke(0);   //...set the color to black
  line(30, i, 80, i);
Description Allows the program to make a decision about which code to execute. If the test evaluates to true, the statements enclosed within the block are executed and if the test evaluates to false the statements are not executed.
if (test) { 
test any valid expression that evaluates to true or false
statements one or more statements to be executed
Updated on January 1, 2021 03:38:12am EST