Numbers

Arithmetic

Elixir supports standard arithmetic operators:

IO.puts(10 + 3)   # 13
IO.puts(10 - 3)   # 7
IO.puts(10 * 3)   # 30

Integer Division and Remainder

Use div/2 for integer division and rem/2 for remainder:

IO.puts(div(10, 3))   # 3
IO.puts(rem(10, 3))   # 1

Floats

Use Float.round/2 to round to a given number of decimal places:

IO.puts(Float.round(3.14159, 2))   # 3.14

Your Turn

Print:

1. 10 + 3 = 13
2. 10 - 3 = 7
3. 10 * 3 = 30
4. div(10, 3) = 3
5. rem(10, 3) = 1
6. Float.round(3.14159, 2) = 3.14