# How to generate the same set of random numbers in R

Some times in testing, it is necessary to generate the same set of random numbers every time the program is run. Use the following methods to achieve it.

### Reuse

Save the same set of random numbers and use it.

```
# Use the dist variable every time you need the same distribution
> dist = rnorm(100, mean=100, sd=10 )
```

### SET.SEED ( )

Use can use the same seed to get the same distribution every time you run rnorm

```
> set.seed(100)
> rnorm(100,mean=100,sd=10)
```