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p5.js | random() Function
  • Last Updated : 22 Apr, 2019

The random() function in p5.js is used to return a random floating point number between ranges given as the parameter.

Syntax:

random(Min, Max)

or

random(Array)

Parameters: This function accepts three parameters as mentioned above and described below:

  • Min: This is the lower bound of the random number which is going to be created. This is an inclusive number with the created random number.
  • Max: This is the upper bound of the random number which is going to be created. This is an exclusive number with the created random number.
  • Array: This is an array of some elements from which any random number is returned.

Return Value: It returns the random number.



Below programs illustrate the random() function in p5.js:

Example 1: This example uses random() function to return a random floating point number between the given range.




function setup() { 
   
    // Creating Canvas size
    createCanvas(550, 140); 
       
    // Set the background color 
    background(220); 
      
    // Calling to random() function with
    // min and max parameters
    let A = random(1, 2);
    let B = random(0, 1);
    let C = random(2);
    let D = random(2, 10);
      
    // Set the size of text 
    textSize(16); 
       
    // Set the text color 
    fill(color('red')); 
     
    // Getting random number
    text("Random number between 1 and 2 is: " + A, 50, 30);
    text("Random number between 0 and 1 is: " + B, 50, 60);
    text("Random number between 0 and 2 is: " + C, 50, 90);
    text("Random number between 2 and 10 is: " + D, 50, 110);

Output:

Note: In the above code, in variable “C” only one parameter is passed then it returns a random number from lower bound 0 to upper bound of that number.

Example 2: This example uses random() function to return a random floating point number between the given range.




function setup() { 
   
    // Creating Canvas size
    createCanvas(550, 140); 
       
    // Set the background color 
    background(220); 
      
    // Calling to random() function with
    // parameter array of some elements
    let A = random([1, 2, 3, 4]);
    let B = random([0, 1]);
    let C = random([2, 6, 7, 9]);
    let D = random([2, 10]);
      
    // Set the size of text 
    textSize(16); 
       
    // Set the text color 
    fill(color('red')); 
     
    // Getting random number
    text("Random number is: " + A, 50, 30);
    text("Random number is: " + B, 50, 60);
    text("Random number is: " + C, 50, 90);
    text("Random number is: " + D, 50, 110);

Output:

Reference: https://p5js.org/reference/#/p5/random

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