C++ `goto` Statement: Syntax, Examples, and Practice

1. Introduction to the goto Statement

The goto statement in C++ is a jump statement. It transfers the program's control from one part of the code to another part identified by a label.

Normally, a program executes statements from top to bottom. The goto statement allows us to jump to a different location in the same function.

Real-life example: Imagine reading a book from page 1 to page 10. Your teacher asks you to skip directly to page 7. You jump to page 7 instead of reading every page in between. The goto statement works in a similar way.

2. Why Do We Use the goto Statement?

The goto statement can be used to:

• Jump to a specific part of a program.
• Repeat a block of code by jumping backward.
• Skip some statements by jumping forward.
• Handle certain situations where a direct jump is useful.

However, excessive use of goto can make a program difficult to understand and maintain. In most cases, for, while, and do-while loops are better choices for repetition.

3. Syntax of the goto Statement

goto label;

// Other statements

label:
    // Statements to execute

Understanding the syntax:

• goto is a C++ keyword used to jump to a label.
• label is a name chosen by the programmer.
• : (colon) marks the label's location.
• The statements after the label execute when control reaches that location.

The label name used with goto must match the label defined in the program.

4. Example 1: Simple goto Statement

Program

#include <iostream>
using namespace std;
 
int main()
{
    cout << "Statement 1" << endl;
 
    goto second;
 
    cout << "Statement 2" << endl;
 
    second:
        cout << "Statement 3" << endl;
 
    return 0;
}

Understand the Code

The program jumps directly to the label second. Therefore, Statement 2 is skipped.

Output

Statement 1
Statement 3

How the program executes

1. Print Statement 1

2. Execute goto second

3. Skip Statement 2

4. Jump to second and print Statement 3

Modify the Code

Make the following changes yourself:

1. Change Statement 1 to Start of Program.
2. Change Statement 2 to This line is skipped.
3. Change Statement 3 to Program continues here.
4. Add another cout statement before goto second.

Question: Which statements will appear in the output, and which statement will be skipped?

5. Example 2: Jumping Forward

A forward jump moves control to a label that appears later in the program.

Program

#include <iostream>
using namespace std;
 
int main()
{
    cout << "Welcome to C++" << endl;
 
    goto finish;
 
    cout << "Learning variables" << endl;
    cout << "Learning conditions" << endl;
 
    finish:
        cout << "End of program" << endl;
 
    return 0;
}

Understand the Code

1. The program prints Welcome to C++.
2. The goto finish statement transfers control to the finish label.
3. Both statements about variables and conditions are skipped.
4. The program prints End of program.

Output

Welcome to C++
End of program

Modify the Code

Modify the program so that:

• It prints Student Registration.
• It jumps to the label result.
• The messages Enter Student Name and Enter Student Roll Number are skipped.
• The label result prints Registration Completed.

Expected output

Student Registration
Registration Completed

6. Example 3: Using goto to Repeat Code

A goto statement can jump backward to repeat statements. This example demonstrates repetition without using a loop.

Program

#include <iostream>
using namespace std;
 
int main()
{
    int count = 1;
 
    repeat:
        cout << count << endl;
        count++;
 
        if (count <= 5)
        {
            goto repeat;
        }
 
    return 0;
}

Understand the Code

• int count = 1; initializes the counter.
• repeat: defines the location to which the program can jump.
• cout << count displays the current number.
• count++ increases the counter by 1.
• if (count <= 5) checks whether another repetition is needed.
• goto repeat sends control back to the label if the condition is true.

Output

1
2
3
4
5

Trace the Code

When count becomes 6, the condition count <= 5 becomes false. The program exits the repetition and reaches return 0;.

Modify the Code

Change the program to print numbers from 1 to 10 instead of 1 to 5.

Hints:

• Keep count = 1.
• Update the condition to count <= 10.
• Keep the label name repeat unchanged.

Challenge: Modify the program to print even numbers from 2 to 10 using goto.

7. Example 4: Jumping Based on a Condition

In this example, the program checks a student's marks and uses goto to jump to a result message.

Program

#include <iostream>
using namespace std;
 
int main()
{
    int marks;
 
    cout << "Enter your marks: ";
    cin >> marks;
 
    if (marks >= 50)
    {
        goto pass;
    }
 
    cout << "You need to improve." << endl;
    goto finish;
 
    pass:
        cout << "Congratulations! You passed." << endl;
 
    finish:
        cout << "Result checking completed." << endl;
 
    return 0;
}

Understand the Code

If the student enters 65:

• The condition marks >= 50 is true.
• The program jumps to pass.
• The pass message is displayed.
• The program continues to finish.

Output:

Enter your marks: 65
Congratulations! You passed.
Result checking completed.

If the student enters 35, the condition is false. The program prints the improvement message and then jumps to finish.

Output:

Enter your marks: 35
You need to improve.
Result checking completed.

Modify the Code

Change the program to use these rules:

• If marks are 80 or above, jump to the label excellent and print Excellent Performance!.
• Otherwise, print Keep Practicing!.
• At the end, print Assessment Completed.

Test the program with marks of 85 and 60.

8. Important Rules of the goto Statement

1. A label must be followed by a colon (:).
2. The goto statement and its target label must be inside the same function.
3. The label name in the goto statement must match the defined label.
4. A forward jump can skip statements.
5. A backward jump can repeat statements.
6. Incorrect use of backward jumps may cause an infinite loop.
7. Avoid jumping into the scope of variables in ways that violate C++ initialization rules.
8. Prefer loops and structured control statements when they make the code easier to understand.

9. Practice Coding Exercises

Solve these exercises yourself before looking for help. Each exercise includes a program statement and a suggested task.

Exercise 1 — Skip a Message

Beginner

Program statement: Write a C++ program that prints Start, jumps over a message saying This message is skipped, and then prints Finish.

Requirements: Use the goto statement and a label named end.

Exercise 2 — Print Numbers

Beginner

Program statement: Write a program that prints numbers from 1 to 7 using a counter, an if statement, and a backward goto.

Requirements: Use the label again. Do not use a loop.

Exercise 3 — Positive or Negative

Beginner–Intermediate

Program statement: Ask the user to enter an integer. If the number is positive, jump to the label positive and print Positive Number. Otherwise, print Zero or Negative Number.

Requirements: Use if, goto, and a suitable label.

Exercise 4 — Pass or Fail

Beginner–Intermediate

Program statement: Input a student's marks. If marks are 50 or above, jump to passed and display Pass. Otherwise, display Fail. Both paths must eventually display Result Completed.

Requirements: Use an if statement, goto, and at least two labels.

Exercise 5 — Display a Menu Again

Intermediate

Program statement: Display a menu with two choices: 1. Say Hello and 2. Exit. If the user selects 1, print Hello Student! and use goto to display the menu again. If the user selects 2, end the program.

Requirements: Use a label named menu. Prevent the program from repeating forever after the user selects 2. For this exercise, you may assume the user enters only 1 or 2.