Title here
Summary here
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.