p5.js nf() Function

The nf() function in p5.js is used to format the input numbers (integers or floats) into strings.

Syntax:

nf(Num/Arr, Left, Right)

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

• Num/Arr: This parameter holds the input positive number or an array of numbers which are to be formatted.
• Left: This is the positive number which says the number of digits should be on the left side of the decimal point.
• Right: This is the positive number which says the number of digits should be on the right side of the decimal point.

Return Value: It returns the formatted string.

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

Example 1: This example uses nf() function to format the input numbers into strings.

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);
}

Output:

Example 2: This example uses nf() function to format the input numbers into strings.

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);
}

Output:

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