# 121. How to reverse an array or character string
topic: {ref}`arrays`
```{note}
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```
Write
v = v(size(v):1:-1)
to reverse a 1-D array v with lower bound 1, otherwise
v = v(ubound(v):lbound(v):-1)
v(::-1) is a zero-size array unless size(v) = 1. A character string can be reversed with the function shown.
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