p5.js Constants QUARTER_PI

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The QUARTER_PI is a mathematical constant with the value 0.7853982. It is one quarter the ratio of the circumference of a circle to its diameter.

Syntax:

QUARTER_PI

Below program illustrates the QUARTER_PI constant in p5.js:

Example: This example describes the QUARTER_PI constant.

function setup() { 
  
    // Create Canvas of size 880*300 
    createCanvas(880, 300); 
} 
  
function draw() { 
      
    // Set the background Color 
    background(220); 
      
    // Set the stroke color 
    stroke(255, 204, 0); 
      
    // Set the stroke weight 
    strokeWeight(4); 
      
    // Use of constant QUARTER_PI 
    arc(50, 50, 280, 280, 0, QUARTER_PI/2);  
      
    noStroke(); 
      
    // Set font size 
    textSize(20); 
      
    // Display result 
    text("Value of QUARTER_PI is " 
            + QUARTER_PI, 30, 150); 
} 

Output:

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

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