F# String Built in Functions

by Online Tutorials Library July 14, 2022

F# String Built-in functions

F# String Concatenation Example

F# allows us to concatenate two strings by using + (plus) operator.

  let StringExample =    let s = “Hello”   s+” “+”FSharp”  printf “%s” StringExample  

Output:

Hello FSharp

F# Substrring Example

  let StringExample (s1:string):string =   printf “%s” (s1.Substring(2))   s1.[2..6]      // You can get substring by passing starting and ending index.  printf “%s” (StringExample “F Sharp”)  

Output:

Sharp  Sharp

F# Get Char Of Given Index Using Char () Method Example

  let StringExample (s1:string) (index :int) =     s1.Chars(index)  let result = StringExample “FSharp” 5  printf “%c” result  

Output:

F# String Compare Example

In F#, we can use Equals () method or comparison (=) operator to compare two string.

  let stringExample =     let s1:string = “hello”;      let s2:string = “hello”;      let s3:string = “csharp”;    printfn “%b” (s1.Equals(s2))    printfn “%b” (s1.Equals(s3))    printfn “%b” (s1=s2)    printfn “%b” (s1=s3)  

Output:

true  false  true  false

F# String Contains Example

The Contains () method in F# searches the specified string in the given string.

  let StringExample =    let s1:string = “Hello FSharp”   printfn “%b” (s1.Contains(“FS”))   printfn “%b” (s1.Contains(“.Net”))  

Output:

true  false

F# String Trim () Example

Trim method of F# removes beginning and ending whitespaces.

  let StringExample =    let s:string = “Hello”   printfn “%s” (s+” FSharp”)   printfn “%s”(s.Trim()+”FSharp”)  

Output:

Hello FSharp  HelloFSharp

Next TopicF# Tuples

F# String Built in Functions

F# String Built-in functions

F# String Concatenation Example

F# Substrring Example

F# Get Char Of Given Index Using Char () Method Example

F# String Compare Example

F# String Contains Example

F# String Trim () Example

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