JShell is a new interactive command-line tool introduced in Java 9. This tool can also be called REPL (Read-Eval-Print-Loop) because it takes input, evaluates it and returns output to the user via command-line.
We can execute multiple-line control flow statements using JShell the same as Java. The control flow statements like If-else statement, for-loop and while-loop can also be executed in JShell. It recognizes multiple-line statements are prompts with the symbol “…>” to indicate to enter the next line statement.
Example of If-Else statement
jshell> int distance = 50 distance ==> 50 jshell> if(distance < 30) { ...> System.out.println("It's near"); ...> } else { ...> System.out.println("It's far"); ...> } It's far jshell>
Example of While Loop
jshell> int i = 10 i ==> 10 jshell> while(i < 25) { ...> System.out.println(i + " "); ...> i++; ...> } 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 jshell>
Example of For Loop
jshell> String names[] = {"Adithya", "Jai", "Raja", "Chaitanya", "Ravi", "Surya"} names ==> String[6] { "Adithya", "Jai", "Raja", "Chaitanya", "Ravi", "Surya" } jshell> for(String name : names) { ...> System.out.println(name); ...> } Adithya Jai Raja Chaitanya Ravi Surya jshell>