goto Statement in C++ (With Examples)

goto-Statement-in-C-Featured-image.jpg

The goto statement in C++ is a control flow instruction that allows unconditional jumps to a labeled part of a program in the same function. Although the goto statement is a part of the C++ programming language, it is still generally advised not to use it in modern C++ programming. The famous “Goto Statement Considered Harmful” essay written by Edsger Dijkstra marked the beginning of structured programming, which pushes developers to use safer and more maintainable alternatives. In this C++ goto statement tutorial, we will discuss what a goto statement is, its syntax, properties, examples, disadvantages, when to use goto in C++, reasons to avoid it, and preferred C++ goto alternatives.

Table of Contents:

What is a goto statement in C++?

A goto statement in C++ is a control flow statement that helps programs to jump or switch to another part of the same function. It provides an unconditional jump within the same function. Also, when a goto statement is executed, then the control transfers directly to the specified label with skipping code in between. Structured alternatives such as loops, conditional statements, and exception handling are preferred instead of using a C++ goto statement.

Syntax of a goto statement in C++

Below is a general syntax of goto in C++:

goto label;
// ... some code ...
label:
// code to execute after jump

Here, the label is a user-defined identifier with a colon(:), which shows the target location in the code.

Example:

Cpp

Output:

goto statement in C++ Example

The code shows how the goto skip statement helps the program to jump directly to the skip: label by skipping the line “This will not be printed”, and then the execution resumes from the label and prints “After goto”.

Flowchart of a goto Statement in C++

The given flowchart shows how goto is a control flow statement in C++ that allows the program to jump unconditionally to a labeled statement, bypassing the normal sequential execution of code. It shows how the flow of execution can move directly from one point to another using a goto label, often skipping blocks of code, which can make the program harder to read and maintain if not used carefully.

Flowchart of a goto Statement in C++

Key Characteristics of the goto Statement in C++

  • It transfers control to a labeled statement without any condition.
  • Both the goto and the target label must be in the same function.
  • A label is an identifier with a colon(:).
  • The code between the goto and its label is skipped during execution.

Practical Examples of goto Statement in C++

Below are a few examples of goto statement in C++:

Example 1: Input Validation Using goto

Cpp

Output:

Example 1: Input Validation Using goto

The code shows how a C++ goto statement is used to repeatedly to give the messages to the user until a valid age input between 0 and 120 is entered, and then the result is printed to the console.

Example 2: Infinite Loop Using goto

Cpp

Output:

Example 2: Infinite Loop Using goto

The code shows how an infinite loop is created using the C++ goto statement, which repeatedly jumps back to the loop_start label, and then prints the message “Welcome to Intellipaat” infinite times.

Example 3: Breaking Out of Nested Loops

Cpp

Output:

Example 3: Breaking Out of Nested Loops

The code shows how a C++ goto is used to exit from both nested loops when i == 2 && j == 2, and then resumes execution at the exit_loops label to print a message and output.

Example 4: Conditional Branching using goto

Cpp

Output:

Example 4: Conditional Branching using goto

The code shows how a C++ goto statement is used to jump to either to even or an odd label based on the given input by the user, and then prints the result to the console.

Example 5: Simple Menu Using goto

Cpp

Output:

Example 5: Simple Menu Using goto

The code shows how the C++ goto statement is used to display a menu and to handle the user input until the user chooses the exit option, and then print the result to the console.

When to Use goto Statement in C++

Below are a few conditions for when to use goto in C++:

  • Breaking out of deeply nested loops, after encountering a situation that requires jumping out of multiple nested loops or conditionals at once, in this situation, a C++ goto statement can make the process easier.
  • Error handling in low-level C++ code.
  • When there is a need to jump to clean a section of the code before returning the value.

What Happens When You Misuse goto in C++?

Here are a few points about what happens when you misuse the goto statement in C++: 

  • Destructors can be skipped: If you use goto to jump over the scope of an object, its destructor won’t be called, causing potential memory leaks.
  • Resource leaks: Since destructors handle cleanup (like closing files or freeing memory), skipping them may lead to unfreed resources.
  • Unpredictable behavior: Misusing goto can result in bugs that are hard to find and reproduce, especially in larger programs.
  • Hard to read: goto breaks the normal top-to-bottom flow of code, making it harder to follow what the program is doing.
  • Difficult to maintain: When goto is used, modifying or extending the code later becomes tricky and error-prone.
  • Leads to unorganized code: Using goto too much can make the code unorganized and confusing.

Why You Should Avoid Using goto in Modern C++

Here, we are going to discuss a few disadvantages of using the goto statement in C++:

  • A goto statement makes the code more difficult to understand.
  • It does not follow the modern programming principles, which provide clear, modular, and flow control practices.
  • It skips the constructor and destructor, which leads to memory leaks and resource management problems.
  • It should be avoided because better alternatives, such as loops, conditionals, exceptions, and functions, make code reusable, safer, and readable.

Benefits of goto Statement in C++

  • Quickly Exits Nested Loops – Helps break out of many nested loops without extra flags or complex conditions.
  • Centralized Error Handling – Allows you to send all the error cases to one cleanup section of the code.
  • Simplifies Cleanup in Low-Level Code – Very useful in embedded systems or legacy C/C++ projects that do not support exceptions.
  • Keeps Legacy Code Compatible – Allows older programs to continue working without needing to rewrite large pieces of code.
  • Clear for Small Special Cases – In short/very simple functions, using goto can allow code flow to be clearer.

Best Alternatives to goto Statement in C++

Here are the best alternatives to the C++ goto statement:

Use Case Preferred Alternative Why These Are Better Than goto
Looping for, while, do-while These loops are clean, clear, and easier to manage.
Exiting nested loops break, return It gives you a clean exit without jumping all over the cases.
Skipping code blocks continue, if-else Keeps the code flow simple and predictable.
Error handling in C++ try-catch, RAII Safer, and ensures resources are cleaned up the right way.
Repeating input logic Loop with condition No need to manually jump back, just use a proper loop.
Cleaning before return RAII, smart pointers They handle cleanup for you automatically, goto is not needed.

Code Readability vs Performance: Why goto Fails

In the trade-off between code readability and performance, the C++ goto statement generally fails for several key reasons:

  • Decreased Readability: goto in C++makes the code flow jump around or can lead to spaghetti code flow, which confuses readers and disrupts the logical structure of the program. It is harder to understand than a well-structured loop or a conditional statement.
  • Most Hard to Maintain: When the code is messy or hard to read, it is very mistakes when changing or fixing it. The goto statement in C++ jumps around in the code, which can confuse the programmer and cause hidden bugs.
  • Performance Gain Is Marginal: In nearly all practical cases, structured constructs (for, while, if) are just as fast as goto in C++ because modern compilers optimize them well.
  • Modern Constructs Replace It: C++ provides structured alternatives like break, continue, return, and exceptions, which make control flow safer and clearer.
  • Bugs from Skipped Cleanup: If goto in C++ jumps past destructors or cleanup logic, it can cause memory/resource leaks, something structured code avoids by design.
  • Best Practice to Avoid Goto: Modern C++ discourages goto because clean, maintainable code matters more than any little performance benefit it might provide.

goto vs break vs return – Which to Use and When?

Here is the table of return vs break vs goto in C++ that shows which to use and when:

Aspect goto break return
Purpose Jumps to a labeled line anywhere in the code Exits a loop or switch statement Exits a function and optionally returns a value
Control Flow Scope Can jump anywhere (same function) Works only inside a loop or a switch Works in any function
Readability Hard to read and trace Easy to read Easy to understand
Best Use Case Avoid if possible; rare error handling When you want to stop a loop early When the function is done or needs to return
Can Skip Cleanup? Yes, may skip destructors No, cleanup in loops still runs No, destructors run when returning
Recommended? Not recommended (last resort) Yes, for loops and switch Yes, for ending functions cleanly

Conclusion

As we discussed above in this article, the C++ goto statement helps in switching to a labeled part of code in the same function. It has some practical applications, but it is mainly advised not to use the goto statement for a few reasons. Also, there are various disadvantages of the goto statement, due to which it is better to use other alternatives such as loops and conditional statements. So, by understanding what a goto statement is, return vs break vs goto in C++, when to use it by following best practices, and when to avoid goto in C++, you can easily write a C++ program using the goto statement.

Useful Resources:

C++ goto Statement – FAQs

Q1. Is goto a control flow statement in C++?

Yes, goto is a control flow statement in C++ that allows an unconditional jump to a labeled statement.

Q2. Can a goto statement jump between two functions?

No, a goto statement can only jump to a part within the same function.

Q3. What are alternatives to goto in C++?

The alternatives to goto in C++ are loops, break, continue, return, and exceptions.

Q4. Does goto affect destructors?

Yes, a goto statement can skip destructors and break RAII if it is not used properly.

Q5. Is goto faster than loops or conditionals?

No, the goto statement is not faster than loops or conditionals, but there is also a negligible performance difference in some cases.

Q6. Can I use goto inside loops in C++?

Yes, you can use goto inside loops in C++, but it is generally discouraged due to reduced code readability.

Q7. Is goto still used in modern C++ programming?

goto is rarely used in modern C++ programming and is generally avoided in favor of structured control flow.

Q8. What are the limitations of using C++ goto statement?

The main limitations of using C++ goto statement are reduced code readability, maintainability, and increased risk of creating spaghetti code.

Q9. When to use goto in C++?

Use goto in C++ only for breaking out of deeply nested loops or handling errors in low-level code, and only when no clearer alternative exists.

Q10. Why should you avoid using the goto in C++ programming?

You should avoid goto in C++ because it makes code harder to read, maintain, and debug, leading to spaghetti code.

About the Author

Technical Research Analyst - Full Stack Development

Kislay is a Technical Research Analyst and Full Stack Developer with expertise in crafting Mobile applications from inception to deployment. Proficient in Android development, IOS development, HTML, CSS, JavaScript, React, Angular, MySQL, and MongoDB, he’s committed to enhancing user experiences through intuitive websites and advanced mobile applications.

Full Stack Developer Course Banner