Bản mẫu:Valid

Determines whether something is valid in a vertain context. Currently only implemented for determining if a number is within the precision that wikipedia expressions can handle.

true if the argument is valid, false if it is not.

{{valid|number=A}} = false (not a number)

{{valid|number=1234}} = true

{{valid|number=+1234}} = true

{{valid|number=-1234}} = true

{{valid|number=(1234)}} = true (one pair of parenthesis is allowed)

{{valid|number=--1234}} = false (incorrect sign use)

{{valid|number=1234567890}} = true

{{valid|number=12345678901234567890}} = false (too large)

{{valid|number=1.234567890}} = true

{{valid|number=1.2345678901234567890}} = false (too many decimals)