p5.js nf() Function

function setup() { 
 
    // Creating Canvas size
    createCanvas(450, 200); 
} 

function draw() { 
     
    // Set the background color 
    background(220); 
   
    // Initializing the Numbers
    let num1 = 345; 
    let num2 = 12.3; 
    let num3 = .5; 
    let num4 = .05; 
    let num5 = 0; 
    let num6 = 0.7; 
    
    // Calling to nf() function.
    let A = nf(num1, 4, 3);
    let B = nf(num2, 4, 2);
    let C = nf(num3, 5, 3);
    let D = nf(num4, 2, 3);
    let E = nf(num5, 2, 2);
    let F = nf(num6, 4, 3);
    
    // Set the size of text 
    textSize(16); 
     
    // Set the text color 
    fill(color('red')); 
   
    // Getting formatted String
    text("Formatted String is: " + A, 50, 30);
    text("Formatted String is: " + B, 50, 60);
    text("Formatted String is: " + C, 50, 90);
    text("Formatted String is: " + D, 50, 110);
    text("Formatted String is: " + E, 50, 140);
    text("Formatted String is: " + F, 50, 170);
} 

function setup() { 
 
    // Creating Canvas size
    createCanvas(450, 90); 
} 

function draw() { 
     
    // Set the background color 
    background(220); 
   
    // Initializing the array of numbers
    let num1 = [345, 0, 2]; 
    let num2 = [12.3, .4, 2.0]; 
    
    // Calling to nf() function.
    let A = nf(num1, 4, 3);
    let B = nf(num2, 4, 2);
    
    // Set the size of text 
    textSize(16); 
     
    // Set the text color 
    fill(color('red')); 
   
    // Getting formatted String
    text("Formatted String is: " + A, 50, 30);
    text("Formatted String is: " + B, 50, 60);
}