Introduction to GoLang

Kursinnehåll

Introduction to GoLang

Introduction to GoLang

1. Getting Started

What is Go Programming Language?Hello World Comments in Go Basics of Variables Modifying Variable Values Constants Basics of Operators & Expressions Challenge: Hello World Challenge: Comments in Go Challenge: Basics of Variables Challenge: Constants

2. Data Types

Integers Floating-Point Numbers Booleans Runes Strings Basic Type Casting String Formatting Challenge: String Formatting Practice

3. Control Structures

Comparison Operators Conditional Statements Conditional Chaining Logical Operators Switch Statement For Loop Break Statement Challenge: Practicing For Loop

4. Functions

Declaring and Defining Functions Local and Global Scopes Passing Data into the Functions Return Values from Functions Multiple Return Values Passing Functions as Arguments Challenge: Reviewing Concepts of Functions

5. Arrays and Slices

Declaring Arrays Accessing and Modifying Array Elements Slices Length vs Capacity Multi-Dimensional Arrays Iterating Over Arrays Passing Variable Number of Arguments into Functions Passing Arrays into Functions Challenge: Finding the Largest Element in a Grid

6. Intro to Structs & Maps

Creating Structs Creating Instances of Structs Data in Structs What are Maps?Map Declaration and Initialization Accessing Map Values Deleting Keys From Maps Challenge: Creating a Structure

Switch Statement

The switch statement provides a convenient way to compare an expression against multiple values. Below is the basic syntax of the switch statement:

switch (expression) {
    case value1: {
        // Code to be executed if the expression equals value1
    }
    case value2: {
        // Code to be executed if the expression equals value2
    }
    case ...
    ...
    default: {
        // Code to be executed if the expression doesn't match any of the values
    }
}

Here are some important points regarding the switch statement:

The expression is evaluated once, and its value is compared against the values specified in each case;
The block of code under the matching case is executed, and the remaining cases are ignored;
If no case matches, the code block under default is executed. The default case is optional and can be left out.

Here is an example of how switch can be used in a program:

index.go


              12345678910111213141516171819202122232425262728
            
package main
import "fmt"

func main() {
    // Let's create a program that prints a message based on the day of the week.
   
    dayOfWeek := 5 // Assuming it's Friday


    switch dayOfWeek {
        case 1:
            fmt.Println("It's Monday! Start the week with enthusiasm.")
        case 2:
            fmt.Println("It's Tuesday! Keep pushing forward.")
        case 3:
            fmt.Println("It's Wednesday! Halfway through the week.")
        case 4:
            fmt.Println("It's Thursday! Almost there, don't give up.")
        case 5:
            fmt.Println("It's Friday! Time to celebrate the weekend.")      
        case 6:
            fmt.Println("It's Saturday! Enjoy your day off.")
        case 7:
            fmt.Println("It's Sunday! Relax and recharge for the week ahead.")
        default:
            fmt.Println("Invalid day of the week.")
    }
}

Note

You can omit braces for the case code blocks.

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 5

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Kursinnehåll

Introduction to GoLang

Introduction to GoLang

1. Getting Started

What is Go Programming Language?Hello World Comments in Go Basics of Variables Modifying Variable Values Constants Basics of Operators & Expressions Challenge: Hello World Challenge: Comments in Go Challenge: Basics of Variables Challenge: Constants

2. Data Types

Integers Floating-Point Numbers Booleans Runes Strings Basic Type Casting String Formatting Challenge: String Formatting Practice

3. Control Structures

Comparison Operators Conditional Statements Conditional Chaining Logical Operators Switch Statement For Loop Break Statement Challenge: Practicing For Loop

4. Functions

Declaring and Defining Functions Local and Global Scopes Passing Data into the Functions Return Values from Functions Multiple Return Values Passing Functions as Arguments Challenge: Reviewing Concepts of Functions

5. Arrays and Slices

Declaring Arrays Accessing and Modifying Array Elements Slices Length vs Capacity Multi-Dimensional Arrays Iterating Over Arrays Passing Variable Number of Arguments into Functions Passing Arrays into Functions Challenge: Finding the Largest Element in a Grid

6. Intro to Structs & Maps

Creating Structs Creating Instances of Structs Data in Structs What are Maps?Map Declaration and Initialization Accessing Map Values Deleting Keys From Maps Challenge: Creating a Structure

Switch Statement

The switch statement provides a convenient way to compare an expression against multiple values. Below is the basic syntax of the switch statement:

switch (expression) {
    case value1: {
        // Code to be executed if the expression equals value1
    }
    case value2: {
        // Code to be executed if the expression equals value2
    }
    case ...
    ...
    default: {
        // Code to be executed if the expression doesn't match any of the values
    }
}

Here are some important points regarding the switch statement:

The expression is evaluated once, and its value is compared against the values specified in each case;
The block of code under the matching case is executed, and the remaining cases are ignored;
If no case matches, the code block under default is executed. The default case is optional and can be left out.

Here is an example of how switch can be used in a program:

index.go


              12345678910111213141516171819202122232425262728
            
package main
import "fmt"

func main() {
    // Let's create a program that prints a message based on the day of the week.
   
    dayOfWeek := 5 // Assuming it's Friday


    switch dayOfWeek {
        case 1:
            fmt.Println("It's Monday! Start the week with enthusiasm.")
        case 2:
            fmt.Println("It's Tuesday! Keep pushing forward.")
        case 3:
            fmt.Println("It's Wednesday! Halfway through the week.")
        case 4:
            fmt.Println("It's Thursday! Almost there, don't give up.")
        case 5:
            fmt.Println("It's Friday! Time to celebrate the weekend.")      
        case 6:
            fmt.Println("It's Saturday! Enjoy your day off.")
        case 7:
            fmt.Println("It's Sunday! Relax and recharge for the week ahead.")
        default:
            fmt.Println("Invalid day of the week.")
    }
}

Note

You can omit braces for the case code blocks.

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 5

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