F#字符串函数

let StringExample = 
 let s = "Hello"
 s+" "+"FSharp"
printf "%s" StringExample

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")

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

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)

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

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