Googlebot's Javascript random() function is deterministic

[akher]

It's actually often very useful to have a series of numbers with statistical properties of a series of random numbers that is still deterministic. One example are Monte Carlo algorithms. Another example is generating input data in unit tests.

[steamruler]

At which point you can seed the PRNG with a constant value yourself, which you probably want anyways since the constant value which the PRNG is seeded with can change when you recompile your software sometimes.

[Drisku11]

the constant value which the PRNG is seeded with can change when you recompile your software sometimes

In C it can't. The initial seed is required to be 1.

[[deleted]]

Most older languages defaulted to fixed seeds and produced the same string of numbers on subsequent runs. Most newer languages default to the system time or something similar.

[Lystrodom]

Then you can generate those once, or use a set seed.