Switch in Nim

Switch Statements in Nim

Switch statements express conditionals across many branches. Here is an example of how you can use switch statements in Nim.

Here’s a basic case statement in Nim.

import times

proc main() =
  let i = 2
  echo "Write ", i, " as "
  case i:
  of 1:
    echo "one"
  of 2:
    echo "two"
  of 3:
    echo "three"

  # You can use commas to separate multiple expressions in the same `of` statement.
  case now().weekday:
  of Sat, Sun:
    echo "It's the weekend"
  else:
    echo "It's a weekday"

  # `case` without an expression is an alternate way to express if/else logic.
  let t = now()
  case true:
  of t.hour < 12:
    echo "It's before noon"
  else:
    echo "It's after noon"

  # A type `case` compares types instead of values.
  proc whatAmI(i: ref object) =
    case i.type:
    of bool:
      echo "I'm a bool"
    of int:
      echo "I'm an int"
    else:
      echo "Don't know type ", i.type

  whatAmI ref false
  whatAmI ref 1
  whatAmI ref "hey"

main()

To run the program, save the code in a file (e.g., switch_example.nim) and use nim to execute it.

$ nim compile --run switch_example.nim
Write 2 as two
It's a weekday
It's after noon
I'm a bool
I'm an int
Don't know type string

Now that we can run and build basic Nim programs, let’s learn more about the language.

If Else in Nim

Arrays in Nim

Learn X By Example

Title here

Switch in Nim

Switch Statements in Nim

Switch in Nim

Switch Statements in Nim#

Switch Statements in Nim