John - 7 months ago 21

Ruby Question

Say I have any of the following numbers:

230957 or

83487 or

4785

What is a way in Ruby I could return them as

300000 or

90000 or

5000, respectively?

Answer

```
def round_up(number)
divisor = 10**Math.log10(number).floor
i = number / divisor
remainder = number % divisor
if remainder == 0
i * divisor
else
(i + 1) * divisor
end
end
```

With your examples:

```
irb(main):022:0> round_up(4785)
=> 5000
irb(main):023:0> round_up(83487)
=> 90000
irb(main):024:0> round_up(230957)
=> 300000
```