F# if then else Expression

by Online Tutorials Library July 14, 2022

F# if-then-else expression

F# if-then-else expression tests the condition. It executes if block if condition is true otherwise else block is executed.

FSHARP If then else expression 1

F# if-then-else Example

  let num = 11  if (num%2=0) then  printfn “It is even number”  else printfn “It is odd number”  

Output:

It is odd number

F# if-then-else Example: with input from user

In this example, we are getting input from the user by using Console.ReadLine() method. It returns string. For numeric value, You have to convert it into int by using Parse.Int32 method.

  open System   // Here, Importing System namespace  Console.Write(“Enter a number : “)  let input = Console.ReadLine()  let num = input |> Int32.Parse   // Casting input to integer  if(num%2=0) then  printfn “It is even number”  else   printfn “It is odd number”     

Output:

Enter a number : 45  It is odd number

Next TopicF# If-elif ladder

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