public class Hello {

public static void main (String[] args) {
    System.out.println("My contact number is: ");

    int srv = 82;
    system.out.println(srv);

Line 5 has a small error.

Try System.out.println(srv);

I think it would be worth your while to check out a modern IDE with syntax checking. Visual Studio Code and Netbeans come to mind. Free and cross platform.

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