# p5.js | randomGaussian() Function

The randomGaussian() function in p5.js is used to return a random value fitting a Gaussian or normal distribution for which mean and standard deviation are given as the parameter.

Syntax:

`randomGaussian( Mean, StandardDeviation )`

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

• Mean: It is the mean of generated random value.
• StandardDeviation: It is the Standard Deviation of generated random value.

Note:

• If one argument is passed as the parameter it means that the mean and standard deviation is 1.
• If two argument is passed as the parameter it means that first is mean and second is a standard deviation.
• If no argument is passed as the parameter it means that mean is 0 and the standard deviation is 1.

Return Value: It returns a random number.

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

Example 1: This example uses randomGaussian() function return the random value for which mean and standard deviation is given as the parameter.

 `function` `setup() {  ` `   `  `    ``// Creating Canvas size ` `    ``createCanvas(550, 140);  ` `       `  `    ``// Set the background color  ` `    ``background(220);  ` `    `  `    ``// Calling to randomSeed() function ` `    ``// It is used for getting constant random ` `    ``// values each time the code is run ` `    ``randomSeed(9) ` `      `  `    ``// Calling to randomGaussian() function ` `    ``// with mean and sd parameters ` `    ``let A = randomGaussian(1, 2); ` `    ``let B = randomGaussian(0, 1); ` `    ``let C = randomGaussian(2); ` `    ``let D = randomGaussian(2, 10); ` `      `  `    ``// Set the size of text  ` `    ``textSize(16);  ` `       `  `    ``// Set the text color  ` `    ``fill(color(``'red'``));  ` `     `  `    ``// Getting random number ` `    ``text(``"Random number is: "` `+ A, 50, 30); ` `    ``text(``"Random number is: "` `+ B, 50, 60); ` `    ``text(``"Random number is: "` `+ C, 50, 90); ` `    ``text(``"Random number is: "` `+ D, 50, 110); ` `} `

Output: Note: In the above example, the variable “C” contains one parameter i.e. mean value is 2 but the standard deviation is 1.

Example 2: This example uses randomGaussian() function return the random value for which mean and standard deviation is given as the parameter.

 `function` `setup() {  ` `  `  `    ``// Creating Canvas size ` `    ``createCanvas(550, 140);  ` `      `  `    ``// Set the background color  ` `    ``background(220);  ` `   `  `    ``// Calling to randomSeed() function ` `    ``// It is used for getting constant random ` `    ``// values each time the code is run ` `    ``randomSeed(9) ` `     `  `    ``// Calling to randomGaussian() function with ` `    ``// mean and sd parameters ` `    ``let A = randomGaussian(); ` `    ``let B = randomGaussian(2.5); ` `    ``let C = randomGaussian(2); ` `    ``let D = randomGaussian(20, 22.5); ` `     `  `    ``// Set the size of text  ` `    ``textSize(16);  ` `      `  `    ``// Set the text color  ` `    ``fill(color(``'red'``));  ` `    `  `    ``// Getting random number ` `    ``text(``"Random number is: "` `+ A, 50, 30); ` `    ``text(``"Random number is: "` `+ B, 50, 60); ` `    ``text(``"Random number is: "` `+ C, 50, 90); ` `    ``text(``"Random number is: "` `+ D, 50, 110); ` `}  `

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