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30 lines
893 B
Markdown
30 lines
893 B
Markdown
# Split A Float Into Its Integer And Decimal
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Let's say we have a float value like `3.725`. We want to break it up into its
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constituent parts -- the integer part (`3`) and the decimal part (`0.725`).
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This can be done with the `divmod` method on the `Numeric` class.
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```ruby
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3.725.divmod(1)
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=> [3, 0.7250000000000001]
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```
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In the general case, this method gives you the quotient and the modulus of
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dividing the number by the given value. When that given value is specifically
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`1`, it will give you those two parts of the float.
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One place where this might be useful is when trying to convert a float
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representing an amount of time into hours and minutes.
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```ruby
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hours = 3.725
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hours_digit, percentage_minutes = hours.divmod(1)
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minutes = (60 * percentage_minutes).to_i
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hours_standard = "#{hours_digit}:#{minutes}"
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```
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[source](https://ruby-doc.org/core-2.5.3/Numeric.html#method-i-divmod)
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