p5.js acos() function

function setup() {

    // Create Canvas of size 380*80
    createCanvas(380, 80);
}

function draw() {
    
    // Set the background color
    background(220);
    
    // Set the angle in radian
    let angle = PI;
    
    // Compute value of cos()
    let c = cos(angle);

    // Compute value of acos()
    // It returns the value of PI
    let ac = acos(c);
    
    // Set the font size
    textSize(16);
    
    // Set the font color
    fill(color('red'));
    
    // Display result
    text("Value of acos is : " + ac, 50, 30);
}

function setup() {

    // Create Canvas of given size
createCanvas(380, 80);
}

function draw() {
    
    // Set the background color
    background(220);
    
    let c = 0.5;
    
    // Use acos() function to calculate
    // arc cosine value
    let ac = acos(c);
    
    // Set font size
    textSize(16);
    
    // Set font color
    fill(color('red'));
    
    // Display result
    text("Value of acos is : " + ac, 50, 30);
}