p5.js draw() Function

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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('zambiatek'); 
    
    var myDiv1 = createDiv('A computer science portal for zambiatek'); 
    
    // 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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