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Topics

Go Basics

Introduction to GoInstalling GoGo SyntaxGo VariablesGo Data TypesGo ConstantsGo OperatorsGo CommentsGo KeywordsGo IdentifiersGo PackagesGo Import StatementGo Main FunctionGo Print Functions

Control Structures

Go If-Else StatementsGo Switch StatementGo For LoopGo RangeGo Break and ContinueGo DeferGo Panic and Recover

Functions

Go Function DeclarationGo Function ParametersGo Return ValuesGo Multiple Return ValuesGo Named Return ValuesGo Variadic FunctionsGo Anonymous FunctionsGo ClosuresGo Recursion

Data Structures

Go ArraysGo SlicesGo MapsGo StructsGo PointersGo Type AssertionsGo Type Switches

Object-Oriented Programming

Go MethodsGo InterfacesGo EmbeddingGo CompositionGo Polymorphism

Concurrency

Go GoroutinesGo ChannelsGo Select StatementGo Buffered ChannelsGo Channel SynchronizationGo Channel DirectionsGo WaitGroupsGo MutexesGo Atomic Operations

Error Handling

Go Error InterfaceGo Creating Custom ErrorsGo Error WrappingGo Error Handling Best Practices

File Handling

Go File OperationsGo Reading FilesGo Writing FilesGo File Permissions

Testing

Go Testing PackageGo Unit TestingGo Benchmark TestingGo Test CoverageGo Table-Driven Tests

Standard Library

Go fmt PackageGo io PackageGo os PackageGo strings PackageGo time PackageGo math PackageGo sort PackageGo encoding/json PackageGo net/http Package

Advanced Topics

Go ReflectionGo ContextGo GenericsGo Memory ManagementGo Garbage CollectionGo Race DetectorGo AssemblyGo cgoGo ProfilingGo Cross-Compilation

Best Practices

Go Code OrganizationGo Error Handling PatternsGo Naming ConventionsGo DocumentationGo Performance OptimizationGo Idiomatic GoGo Project Structure

Tools and Ecosystem

Go ModulesGo WorkspacesGo Command-Line ToolsGo LintersGo FormattersGo Dependency ManagementGo Build TagsGo Generate

Break and Continue Statements in Go

In Go programming, break and continue statements are essential tools for controlling the flow of loops. These statements allow developers to create more efficient and flexible code by manipulating loop execution.

The Break Statement

The break statement is used to exit a loop prematurely. When encountered, it immediately terminates the innermost loop and transfers control to the next statement after the loop.

Example of Break Statement


for i := 0; i < 10; i++ {
    if i == 5 {
        break
    }
    fmt.Println(i)
}
fmt.Println("Loop terminated")

In this example, the loop will print numbers from 0 to 4 and then exit when i equals 5.

The Continue Statement

The continue statement skips the rest of the current iteration and moves to the next iteration of the loop. It's useful when you want to skip certain elements in a loop without terminating it entirely.

Example of Continue Statement


for i := 0; i < 5; i++ {
    if i == 2 {
        continue
    }
    fmt.Println(i)
}

This code will print numbers 0, 1, 3, and 4, skipping 2 due to the continue statement.

Using Break and Continue in Nested Loops

When working with nested loops, break and continue affect only the innermost loop by default. However, Go provides labels to control outer loops as well.


outerLoop:
    for i := 0; i < 3; i++ {
        for j := 0; j < 3; j++ {
            if i == 1 && j == 1 {
                break outerLoop
            }
            fmt.Printf("%d %d\n", i, j)
        }
    }

In this example, the break statement with the label outerLoop will terminate both inner and outer loops when i and j are 1.

Best Practices

  • Use break when you need to exit a loop early based on a condition.
  • Employ continue to skip unnecessary iterations and improve performance.
  • Be cautious with labels in nested loops to maintain code readability.
  • Consider refactoring complex loop logic into separate functions for better maintainability.

Related Concepts

To further enhance your understanding of Go's control flow, explore these related topics:

Mastering break and continue statements will significantly improve your ability to write efficient and elegant Go code. Practice using these statements in various scenarios to become proficient in controlling loop execution.