Szathmáry László honlapja @ DEIK | Nim2 / case statement

In C it is called a switch statement.

let x = 3

case x
of 1:
echo "one"
of 2:
echo "two"
of 3:
echo "three"
else:
echo "something else"

𝥶At the end of the of branches, no break is necessary. Execution won't flow over the next branch.

match multiple values
let x = 3 case x of 1, 2: echo "one or two" of 3..5: echo "between three and five" else: echo "something else"	let x = 3 case x of 1, 2: echo "one or two" of 3..4, 5: # also works echo "between three and five" else: echo "something else"

𝥶You can also match multiple values as well as a range in a branch.

A case statement must cover all possible cases. If the else part is not important, then discard it:

let x = 10

case x
of 1:
echo "one"
of 2:
echo "two"
of 3:
echo "three"
else:
discard

The case expression

case can be an expression, similarly to if:

let x = 3

let status = case x
of 1, 2:
"one or two"
of 3..5:
"between three and five"
else:
"something else"

echo status # between three and five