Reference for Processing version 1.2. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.
| Name | random() |
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| Examples | for(int i=0; i<100; i++) {
float r = random(50);
stroke(r*5);
line(50, i, 50+r, i);
}for (int i = 0; i < 100; i++) {
float r = random(-50, 50);
println(r);
}// Get a random element from an array
String[] words = { "apple", "bear", "cat", "dog" };
int index = int(random(words.length)); // same as int(random(4))
println(words[index]); // prints one of the four words |
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| Description | Generates random numbers. Each time the random() function is called, it returns an unexpected value within the specified range. If one parameter is passed to the function it will return a float between zero and the value of the high parameter. The function call random(5) returns values between 0 and 5 (starting at zero, up to but not including 5). If two parameters are passed, it will return a float with a value between the the parameters. The function call random(-5, 10.2) returns values starting at -5 up to (but not including) 10.2. To convert a floating-point random number to an integer, use the int() function. | ||||
| Syntax | random(high); random(low, high); |
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| Parameters |
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| Returns | float | ||||
| Usage | Web & Application | ||||
| Related | randomSeed() noise() |
