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p5.js log() function

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The log() function in p5.js is used to get the natural logarithm (of base “e”) of any number taken as input for the parameter of log() function.



Parameters: This function accepts a single parameter x which is any number greater than zero (0) taken as the input whose natural log is going to be calculated.

Return Value: It returns the natural log of any input number greater than zero (0).

Below program illustrates the log() function in p5.js:

Example: This example uses log() function to get the natural log value of any input number. 


function setup() { 
    // Create Canvas of size 270*80 
    createCanvas(550, 130); 
function draw() { 
    // Set the background color 
    // Initialize the parameter 
    let a = 5; 
    let b = 7.7; 
    let c = 0;
    let d = -5;
    // Call to log() function 
    let v = log(a);
    let w = log(b);
    let x = log(c);
    let y = log(d);
    // Set the size of text 
    // Set the text color 
    // Getting natural log value
    text("Natural logarithm value of 5 is : " + v, 50, 30);
    text("Natural logarithm value of 7.7 is : " + w, 50, 50);
    text("Natural logarithm value of 0 is : " + x, 50, 70);
    text("Natural logarithm value of -5 is : " + y, 50, 90);


Note: If we take input as a negative value and zero then it returns the output as “NaN” and -Infinity respectively.


Last Updated : 23 Aug, 2023
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