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Recap - Input and Output

Part of the Fundamentals section of Coddy's GO journey. Lesson 33 of 109.

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Challenge

Easy

In this challenge, you'll practice using fmt.Printf to display formatted output with different format specifiers.

Complete the code to display information about a Gopher using the appropriate format specifiers:

  • Use %s for strings
  • Use %d for integers
  • Use %.2f for floating-point numbers with 2 decimal places
  • Use %t for boolean values
  • Use %T to display the type of a variable

Make sure each output line ends with a newline character (\n).

The exact text is Active: true.

The exact text is Age: 5 years.

The exact text is Name: Gopher.

Try it yourself

package main

import "fmt"

func main() {
  // Given variables
  name := "Gopher"
  age := 5
  height := 0.75
  isActive := true

  // TODO: Use fmt.Printf to print the name line from the instructions, using the name variable and the %s format specifier
  
  // TODO: Use fmt.Printf to print the age line from the instructions, using the age variable and the %d format specifier
  
  // TODO: Use fmt.Printf to print "Height: 0.75 meters" using the height variable and the %.2f format specifier
  
  // TODO: Use fmt.Printf to print the active line from the instructions, using the isActive variable and the %t format specifier
  
  // TODO: Use fmt.Printf to print "Name type: string" using the name variable and the %T format specifier
  
}

All lessons in Fundamentals

1Introduction to Go

What is Go?Hello WorldPrintlnGo Comments

4Comparison & Logical Operators

Comparison Operators - Part 1Comparison Operators - Part 2Logical AND OperatorLogical OR OperatorLogical NOT OperatorOperator Precedence BasicsRecap - Making Comparisons

7Control Flow: Loops

What The `for` Loop ExplainedFor Loop - BasicFor Loop - Condition OnlyThe `break` KeywordThe `continue` KeywordNested LoopsRecap - Repeating Actions

10Composite Types: Arrays

Introduction to ArraysDeclaring ArraysInitializing ArraysAccessing Array ElementsArray Length with `len`Iterating Over ArraysMulti-dimensional Arrays

13Composite Types: Structs

Defining Custom TypesCreating Struct InstancesAccessing Struct FieldsPointers to StructsInitializing StructsEmbedded StructsAnonymous StructsRecap - Custom Data Structures

2Variables and Basic Data Types

What is a variableType Inference with `:=`Integers (int)Floating-Point NumbersBooleansStringsZero ValuesConstantsNaming ConventionsRecap - Variables and Types

5Basic Input/Output

Formatted OutputFormat VerbsPrinting TypesGetting Basic User InputRecap - Input and Output

8Functions

Understanding FunctionsDeclaring a FunctionCalling FunctionsFunction ParametersReturning a Single ValueReturning Multiple ValuesNamed Return ValuesFunction Scope BasicsRecap - Creating Reusable Code

11Composite Types: Slices

Introduction to SlicesDeclaring Slice LiteralsCreating Slices with `make`Slice Length vs CapacityAccessing Slice ElementsAppending ElementsSlicing Existing Slices/ArraysIterating Over SlicesCopying SlicesRecap - Dynamic Lists

14Basic Error Handling

The Concept of ErrorsThe `error` InterfaceFunctions Returning ErrorsChecking for ErrorsCreating Simple ErrorsCreating Formatted ErrorsBasic Error HandlingRecap - Handling Problems

3Basic Operators

Arithmetic OperatorsDivision OperatorThe Modulo OperatorAssignment OperatorAugmented Assignment OperatorsIncrement and DecrementRecap - Calculations

6Control Flow: Conditionals

The `if` StatementThe `else` KeywordThe `else if` KeywordVariable Shadowing in `if`Initializing VariablesThe `switch` StatementSwitch with ExpressionsSwitch without ExpressionThe `fallthrough` KeywordRecap - Making Decisions

9Pointers

What is a Pointer?Declaring Pointer VariablesThe Address-Of OperatorDereferencing PointersUsing Pointers in FunctionsNil PointersRecap - Understanding Pointers

12Composite Types: Maps

Introduction to MapsDeclaring Map LiteralsCreating Maps with `make`Adding and Updating Key-ValueAccessing Map ValuesChecking for Key ExistenceDeleting Map EntriesMap LengthIterating Over MapsRecap - Key-Value Storage

Practice on your own: Online Go compiler