Bottle.Number.is_non_neg_number

You're seeing just the macro is_non_neg_number, go back to Bottle.Number module for more information.
Link to this macro

is_non_neg_number(sub)

View Source (macro)

Guard that passes when a number is a non_neg_number

Examples

iex> is_non_neg_number(1)
true

iex> is_non_neg_number(1.1)
true

iex> is_non_neg_number(0)
true

iex> is_non_neg_number(-1)
false

iex> is_non_neg_number({"anything", "else"})
false