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

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F# String Built-in functions

F# String Concatenation Example

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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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