Math

Standard math functions.

Function Documentation

Generate a pseudo-random integer between 0 and RAND_MAX inclusive.

This function can be seeded by srand().

A simple way to change the range to be an integer between 0 and n-1 inclusive is using % e.g. rand() % n.

Returns

The pseudo-randomly generated number

Seed the pseudo-random number generator.

When your app starts, the pseudo-random number generator is automatically seeded with a random number that is generated by a high-entropy hardware random number generator.

This function affects subsequent calls to rand() to produce a sequence of numbers for a given seed value. You can use this to either create a different sequence of numbers by always using a different seed or to obtain the same sequence of numbers by reusing the same seed.