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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

Go Print Functions

Go provides several print functions in the fmt package for outputting text to the console or formatting strings. These functions are essential for displaying information and debugging in Go programs.

Basic Print Functions

fmt.Println

The fmt.Println function prints one or more values followed by a newline character. It's the simplest way to output text in Go.


fmt.Println("Hello, World!")
name := "Alice"
age := 30
fmt.Println("Name:", name, "Age:", age)

fmt.Print

fmt.Print is similar to fmt.Println, but it doesn't add a newline at the end.


fmt.Print("Hello, ")
fmt.Print("World!")

Formatted Print Functions

fmt.Printf

fmt.Printf allows you to format strings using verbs. It's powerful for creating custom output formats.


name := "Bob"
age := 25
fmt.Printf("Name: %s, Age: %d\n", name, age)

Common Format Verbs

  • %v: Default format
  • %s: String
  • %d: Integer
  • %f: Float
  • %t: Boolean
  • %T: Type of the value

String Formatting

fmt.Sprintf

fmt.Sprintf formats and returns a string without printing it. It's useful for creating formatted strings for later use.


name := "Charlie"
age := 35
formattedString := fmt.Sprintf("Name: %s, Age: %d", name, age)
fmt.Println(formattedString)

Best Practices

  • Use fmt.Println for simple output and debugging.
  • Prefer fmt.Printf when you need precise control over formatting.
  • Utilize fmt.Sprintf to create formatted strings for later use or manipulation.
  • Be mindful of performance when using formatted print functions in tight loops.

Related Concepts

To further enhance your understanding of Go programming, explore these related topics:

Mastering Go's print functions is crucial for effective programming and debugging. Practice using these functions in various scenarios to become proficient in outputting and formatting data in your Go programs.