F # - instruction if / elif / else

Un if/then/elif/else construct a plusieurs branches else.

Syntaxe

La syntaxe d'une instruction if / then / elif / else en langage de programmation F # est -

if expr then
   expr
elif expr then
   expr
elif expr then
   expr
...
else
   expr

Exemple

let a : int32 = 100

(* check the boolean condition using if statement *)

if (a = 10) then
   printfn "Value of a is 10\n"
elif (a = 20) then
   printfn " Value of a is 20\n"
elif (a = 30) then
   printfn " Value of a is 30\n"
else
   printfn " None of the values are matching\n"
   printfn "Value of a is: %d" a

Lorsque vous compilez et exécutez le programme, il produit la sortie suivante -

None of the values are matching

Value of a is: 100