# Seed - probability distribution functions

Hello experts!

In a new user of sage.

This is a triple-question for you:

1) Reading the 'Craig Finch Sage Beginners Guide' page 236 I find the next script (about accessing probability distribution functions):

```
variance = 0.75
gaussian = RealDistribution('gaussian', variance)
gaussian.set_seed(0.0)
random_values = [gaussian.get_random_element() for i in range(1000)]
gaussian_plot = gaussian.plot((-5, 5))
```

The 1st question is ¿Whats for gaussian.set_seed(0.0)? ¿What does (0.0) seed value minds?

2) ¿What must i write in a script for obtain a normal (gaussian) distribution center in 'C' with variance 'V'?

3) Again, in 'Craig Finch Sage Beginners Guide' page 305 i find:

```
rng = RealDistribution('uniform', [0,dimension], seed=1)
```

¿Whats for seed=1 value? ¿What does 1 seed value minds?

Waiting for your answers.

Thaks a lot!!