What is error in this program

Question

1.00/5 (3 votes)

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Java

Public class Main
{
  Public static void main (String [] args)
{
  Int num;
  System.out.println("Enter any numberequal to or between 1-12 to display the month");
switch (num)
    {
    case 1:
        System.out.println ("The name of month number 1 is January");
        break;
    case 2:
        System.out.println ("The name of month number 2 is February");
        break;
    case 3:
        System.out.println ("The name of month number 3 is March");
        break;
    case 4:
        System.out.println ("The name of month number 4 is April");
        break;
    case 5:
        System.out.println ("The name of month number 5 is May");
        break;
    case 6:
        System.out.println ("The name of month number 6 is June");
        break;
    case 7:
        System.out.println ("The name of month number 7 is July");
        break;
    case 8:
        System.out.println ("The name of month number 8 is August");
        break;
    case 9:
        System.out.println ("The name of month number 9 is September");
        break;
    case 10:
        System.out.println ("The name of month number 10 is October");
        break;
    case 11:
        System.out.println ("The name of month number 11 is November");
        break;
    case 12:
        System.out.println ("The name of month number 12 is December");
        break;
        default:
            System.out.println ("You have entered an invalid number");
        }
    } // main method
}<

What I have tried:

Main.java:9: error: variable num might not have been initialized
switch (num)
^
What I have to add to this code

Posted 2-Dec-20 3:05am

Group 15005118

Updated 2-Dec-20 4:01am

CHill60

v2

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Comments

Richard MacCutchan 2-Dec-20 9:29am

This is the third Java question today, all tagged as C. Please use the correct language tags for your questions.

OriginalGriff 2-Dec-20 10:07am

This is the third question today, all trivial syntax errors: you need to learn to fix these yourself - it will save you a lot of time if you do ...

KarstenK 2-Dec-20 12:30pm

only have to read the compiler message carefully and think about it. It is my daily bread over 20 years in coding ;-)

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CHill60 · Answer 1 · 2020-12-02T03:22:00

See your code

Java

Int num;
  System.out.println("Enter any numberequal to or between 1-12 to display the month");
switch (num)

You have declared numwith

Java

Int num;

You then output a message to the user with

Java

System.out.println("Enter any numberequal to or between 1-12 to display the month");

But then the next thing you do is to try and use num

Java

switch (num)

You need to insert a line to get the input from the user into the variable nume.g. (not tested!)

Java

scanf("%d", &num);

I've just seen some of your other questions in this forum, this is not a good way to learn the C language (or any language) - get yourself a good book and work through it rather than asking questions here every time you hit a compiler error. Or have a read of this How to Write Code to Solve a Problem, A Beginner's Guide[^]

Richard MacCutchan · Answer 2 · 2020-12-02T03:31:00

Solution 2

You will learn Java quicker by studying The Java™ Tutorials[^].

Posted 2-Dec-20 3:31am

Richard MacCutchan

Patrice T · Answer 3 · 2020-12-02T04:01:00

C++

Public class Main
{
  Public static void main (String [] args)
{
  // beware, variables types are lowercase, aka int, not Int
  Int num; // here you declare num without value
  System.out.println("Enter any numberequal to or between 1-12 to display the month");
switch (num) // here you use num, but where did you gave it a value ?
    {
    case 1:
        System.out.println ("The name of month number 1 is January");
        break;

What is error in this program

3 solutions

Solution 1

Solution 2

Solution 3

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