Integer.to_string

You're seeing just the function to_string, go back to Integer module for more information.
Link to this function

to_string(integer, base \\ 10)

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Specs

to_string(integer(), 2..36) :: String.t()

Returns a binary which corresponds to the text representation of integer in the given base.

base can be an integer between 2 and 36. If no base is given, it defaults to 10.

Inlined by the compiler.

Examples

iex> Integer.to_string(123)
"123"

iex> Integer.to_string(+456)
"456"

iex> Integer.to_string(-789)
"-789"

iex> Integer.to_string(0123)
"123"

iex> Integer.to_string(100, 16)
"64"

iex> Integer.to_string(-100, 16)
"-64"

iex> Integer.to_string(882_681_651, 36)
"ELIXIR"