REBOL 3 Functions: repeat

repeat word value body

Evaluates a block a number of times or over a series.

Arguments:

word [word!] - Word to set each time

value [number! series! none!] - Maximum number or series to traverse

body [block!] - Block to evaluate each time

Description

The repeat function is an easy way to repeat the evaluation of a block with a loop counter.

repeat num 3 [print num]
1
2
3

Here the num counter begins at one and continues up to and including the integer value given.

Other Notes

Negative or zero loop counts do not evaluate the block.
If a decimal! count is used, it will be truncated to a lower integer value.
The break function can be used to stop the loop at any time.
The loop function is similar to repeat, except that it has no loop counter. If you don't need the counter, loop is more efficient.
The evaluated block is deep copied and rebound (see bind ) to a new context that holds the loop variable. For large nested repeat loops, you will want to consider this overhead. An alternative is to use while, until, or loop which do not require the copy and bind.

In question...

If the value is a series, then the loop will repeat for each element of the series.

However, there's currently a difference between R2 and R3. In R2, if the value is a series, then the word holds the first value of each element of the series. In R3 it holds just the indexed series.

Editor note: Determine if this is intentional