randomNumber min/max

Category:Math

randomNumber(min, max)

Category: Math

Returns a random number in the closed range from min to max.

You will find many opportunities in your apps to utilize random numbers. For turtle drawing you can randomize all the movement functions, the pen RGB color, pen thickness, and dot size. Any numeric function parameter with a valid range of values can be randomized.

Examples

// Generates a random number in the range 5 to 20 (inclusive).
console.log(randomNumber(5, 20));

Random Walk Do a "random walk" of 4 steps, turning a random number of degrees after each step.

// Do a "random walk" of 4 steps, turning a random number of degrees after each step.
moveForward();
turnRight(randomNumber(-90, 90));
moveForward();
turnRight(randomNumber(-90, 90));
moveForward();
turnRight(randomNumber(-90, 90));
moveForward();

Clouds Draw a cloud mass using randomly sized dots at random locations near each other.

// Draw a cloud mass using randomly sized dots at random locations near each other.
penColor("skyblue");
dot(300);
penUp();
penRGB(245, 245, 245,0.3);
moveTo(randomNumber(0, 320),randomNumber(0, 450));
for (var i = 0; i < 50; i++) {
  moveTo(getX()+randomNumber(-25, 25),getY()+randomNumber(-25, 25));
  dot(randomNumber(25,50));
}

Syntax

randomNumber(min, max);

Parameters

Name	Type	Required?	Description
min	number	Yes	The minimum number returned
max	number	Yes	The maximum number returned

Returns

Returns a random number in the range min to max (inclusive). The number returned will always be an integer.

Tips

Negative values for parameters min or max are allowed.
If you accidentally make min larger than max it will still return a random number in the range.
The number returned is not truly random as defined in mathematics but is pseudorandom.

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