The noLoop() function is used to stop the program after executing the draw() function. The loop() function runs the draw() function again and again. If noLoop() function is used in setup() function then it should be the last line inside the block. If noLoop() function is used then it is not possible to change or access the screen inside event handling functions such as mousePressed() or keyPressed().
Syntax:
noLoop()
Below examples illustrate the noLoop() function in p5.js:
Example 1:
function setup() { // Create canvas of given size createCanvas(500, 300); // Set the background color background('green'); // Use noLoop() function noLoop(); } function draw() { // Set the stroke color stroke('white'); // Set the stroke width strokeWeight(4); // Function to draw the line line(50, 50, 450, 250); } |
Output:
Example 2:
let l = 0; function setup() { // Create canvas of given size createCanvas(500, 300); // Set the background color background('green'); } function draw() { // Set the stroke color stroke('white'); l = l + 0.5; if (l > width) { l = 0; } // Function to draw the line line(l, 0, l, height); } function mousePressed() { noLoop(); } function mouseReleased() { loop(); } |
Output:
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