Random numbers

random(), randomSeed(). More...

Functions
long	random (long)
	Pseudo-random number from 0 up to, but not including, the argument.
long	random (long, long)
	Pseudo-random number from the first argument up to, but not including, the second.
void	randomSeed (unsigned long)
	Starts the random sequence at a new point.

Detailed Description

random(), randomSeed().

Function Documentation

random() [1/2]

long random

(

long

)

Pseudo-random number from 0 up to, but not including, the argument.

random(max).

Returns

0 to max - 1; 0 if max is 0 or less.

random() [2/2]

long random	(	long	,
		long	)

Pseudo-random number from the first argument up to, but not including, the second.

random(min, max).

Returns

min to max - 1; min if min is not less than max.

randomSeed()

void randomSeed

(

unsigned long

)

Starts the random sequence at a new point.

Without it, random() gives the same sequence after every reset. Seed with something that differs each time, e.g. micros() when a button is first pressed. A seed of 0 is ignored.