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truncate 

        # Integer.truncate

(from ruby core)
---
    truncate(ndigits = 0) -> integer

---

Returns `self` truncated (toward zero) to a precision of `ndigits`
decimal digits.

When `ndigits` is negative, the returned value has at least
`ndigits.abs` trailing zeros:

    555.truncate(-1)  # => 550
    555.truncate(-2)  # => 500
    -555.truncate(-2) # => -500

Returns `self` when `ndigits` is zero or positive.

    555.truncate     # => 555
    555.truncate(50) # => 555

Related: Integer#round.

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