312: Highlights

If you want to repeat a calculation for as long as a Boolean expression's value is true, then use a whileTrue: expression:
```
receiver block whileTrue: argument block 
```
If you want to repeat a calculation for as long as a Boolean expression's value is false, then use a whileFalse: expression:
```
receiver block whileFalse: argument block 
```
If you want to repeat a calculation for a specified number of times, then use a timesRepeat: expression with a block parameter:
```
integer number of repeats timesRepeat: [statements] 
```
If you want to repeat a calculation a given number of times and you want to use a range of integers in the calculation, then use a to:do: expression:
```
lowest integer to: highest integer  
                do: [:parameter name |statements] 
```