Examples of the most used string methods
The String class includes many methods for handling the string. Look at the examples below and try them one at a time:
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; this.Text = alphabet.ToLower(); // abcdefghijklmnopqrstuvwxyz this.Text = "" + alphabet.Length; // 26 this.Text = alphabet.Substring(0, 3); // ABC this.Text = alphabet.Substring(5, 2); // FG this.Text = alphabet.Substring(20); // UVWXYZ this.Text = ""+ alphabet.IndexOf("D"); // 3 this.Text = "" + alphabet.IndexOf("XYZ"); // 23 this.Text = "" + alphabet.IndexOf("xyz"); // -1 "xyz" is not found this.Text = "" + alphabet.StartsWith("A"); // True this.Text = "" + alphabet.StartsWith("ABC"); // True this.Text = "" + alphabet.StartsWith("AC"); // False this.Text = "" + alphabet.Replace("A", "*"); // *BCDEFGHIJKLMNOPQRSTUVWXYZ this.Text = "" + alphabet.Contains("DEF"); // True String sentence = "A man and a woman manage the store."; this.Text = "" + sentence.LastIndexOf("man"); // 18 (in manage) this.Text = "" + sentence.Replace("man", "person"); //A person and a woperson personage the store. String[] words = sentence.Split(' '); this.Text = "" + words.Length; // 8 this.Text = words[0]; // A this.Text = words[1]; // man this.Text = words[2]; // and this.Text = words[words.Length-1]; // store. Note: the period is part of last word.
Like arrays, the index on Strings begins with 0. The Length() of Alphabet is 26, there are 26 letters with A in position 0 and Z in position 25. We can combine these functions in various ways.
String Functions