The draw() function is called after setup() function. The draw() function is used to executes the code inside the block until the program is stopped or noLoop() is called. If the program does not contain noLoop() function within setup() function then draw() function will still be executed once before stopping it. It should always be controlled with noLoop(), redraw() and loop() functions.
Syntax:
draw()
Below examples illustrate the draw() function in p5.js:
Example 1:
function setup() {           // Create Canvas of given size     createCanvas(400, 300); }   function draw() {           background(220);           // Use color() function     let c = color('green');       // Use fill() function to fill color     fill(c);           // Draw a rectangle     rect(50, 50, 300, 200);       } |
Output:
Example 2:
function setup() {           // Create Canvas of given size     var cvs = createCanvas(600, 250); }   function draw() {         // Set the background color     background('green');         // Use createDiv() function to     // create a div element     var myDiv = createDiv('neveropen');         var myDiv1 = createDiv('A computer science portal for neveropen');         // Use child() function     myDiv.child(myDiv1);         // Set the position of div element     myDiv.position(150, 100);          myDiv.style('text-align', 'center');         // Set the font-size of text     myDiv.style('font-size', '24px');         // Set the font color     myDiv.style('color', 'white');   } |
Output:
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