Introduction to GoLang

Kurssisisältö

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

Deleting Keys From Maps

We can also remove key-value pairs from maps using the delete() function.

delete(mapName, keyName)

Here are some points to note regarding the delete() function:

The delete function does not return any value;
If the key keyName doesn't exist, it simply does nothing;
If the map mapName doesn't exist, it shows an error during compilation.

Here is an example of the delete() function being used in a program:

index.go


              12345678910111213
            
package main
import "fmt"

func main() {  
    var numbers = map[string]int {
        "one": 1,
        "two": 2,
        "three": 3,
    }
    fmt.Println(numbers) // Output: map[one:1 three:3 two:2]
    delete(numbers, "three")
    fmt.Println(numbers) // Output: map[one:1 two:2]
}

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Osio 6. Luku 7

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Kurssisisältö

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

Deleting Keys From Maps

We can also remove key-value pairs from maps using the delete() function.

delete(mapName, keyName)

Here are some points to note regarding the delete() function:

The delete function does not return any value;
If the key keyName doesn't exist, it simply does nothing;
If the map mapName doesn't exist, it shows an error during compilation.

Here is an example of the delete() function being used in a program:

index.go


              12345678910111213
            
package main
import "fmt"

func main() {  
    var numbers = map[string]int {
        "one": 1,
        "two": 2,
        "three": 3,
    }
    fmt.Println(numbers) // Output: map[one:1 three:3 two:2]
    delete(numbers, "three")
    fmt.Println(numbers) // Output: map[one:1 two:2]
}

Oliko kaikki selvää?

Kiitos palautteestasi!

Osio 6. Luku 7

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