CodeTheta

Below program segment value given by user in program execution time.
Code :
package demo;
import java.util.Scanner;
/*
 * @author www.CodeTheta.com
 */
public class Demo {
    public static void main(String[] args) {
    String UserString;
    System.out.println("Enter any string: ");
    Scanner in = new Scanner(System.in);
    UserString = in.next();
    System.out.println("Length of given string is: "+UserString.length());   
    }   
}

Output :
Enter any string: 
www.codetheta.com
Length of given string is: 17

Below program segment value already assigned.
Code :
package demo;
/*
 * @author www.CodeTheta.com
 */
public class Demo {
    public static void main(String[] args) {
    String UserString = "www.codetheta.com";
    System.out.println("Length of given string is: "+UserString.length());   
    }   

}

Output :
Length of given string is: 17

IDE Used To Test This Code : NetBeans IDE 8.2

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