In Elixir, how do you format numbers with string interpolation

elixir
Matt picture Matt · Dec 18, 2015 · Viewed 17.1k times · Source

I want to print out a string like

IO.puts("Count: #{my_count}")

But I want leading zeroes in the output like

Count: 006

How do I do that and where is that documentation?

Answer

Dmitry Biletskyy picture Dmitry Biletskyy · Dec 18, 2015

You can use String.pad_leading/3

my_count
|> Integer.to_string
|> String.pad_leading(3, "0")

Related questions

How to join strings in Elixir?

How do I join two strings in a list with a space, like: ["StringA", "StringB"] becomes "StringA StringB"

Read More
How do you check for the type of variable in Elixir

In Elixir how do you check for type such as in Python: >>> a = "test" >>> type(a) <type 'str'> >>> b =10 >>> type(b) <type 'int'> I …

Read More
Convert Elixir string to integer or float

I need to convert a string to a floating point value or an integer. There was no method such as, string_to_integer

Read More