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Introduction to GoLang

Data in StructsData in Structs

Now that we know how to create an instance of a structure, we should learn how to store and modify data in them.

We can use the dot (.) symbol followed by the field name to reference it. Consider the example in the following program, where we create an instance of the Student class called student1:

go

index.go

This is because no data was manually stored in the structure, causing each of the fields to take a default zero value based on its type.

Note

In Go, we cannot specify our own default values for the fields; it automatically assigns zero values to the fields based on their types. However, we can specify custom default values by creating a constructor function, which is beyond the scope of this course as it requires knowledge of pointers.

We can also reference and assign values to the fields using the same referencing method, for example:

go

index.go

Therefore, we can modify the program above to store some initial data accordingly:

go

index.go

Note

The fields of a struct are also referred to as members.

Which symbol do we use for accessing the struct members / fields:

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Секція 6. Розділ 3
course content

Зміст курсу

Introduction to GoLang

1. Getting Started

What is Go Programming Language?Hello WorldComments in GoBasics of VariablesModifying Variable ValuesConstantsBasics of Operators & ExpressionsChallenge: Hello WorldChallenge: Comments in GoChallenge: Basics of VariablesChallenge: Constants

2. Data Types

IntegersFloating-Point NumbersBooleansRunesStringsBasic Type CastingString FormattingChallenge: String Formatting Practice

3. Control Structures

Comparison OperatorsConditional StatementsConditional ChainingLogical OperatorsSwitch StatementFor LoopBreak StatementChallenge: Practicing For Loop

4. Functions

Declaring and Defining FunctionsLocal and Global ScopesPassing Data into the FunctionsReturn Values from FunctionsMultiple Return ValuesPassing Functions as ArgumentsChallenge: Reviewing Concepts of Functions

5. Arrays and Slices

Declaring ArraysAccessing and Modifying Array ElementsSlicesLength vs CapacityMulti-Dimensional ArraysIterating Over ArraysPassing Variable Number of Arguments into FunctionsPassing Arrays into FunctionsChallenge: Finding the Largest Element in a Grid

6. Intro to Structs & Maps

Creating StructsCreating Instances of StructsData in StructsWhat are Maps?Map Declaration and InitializationAccessing Map ValuesDeleting Keys From MapsChallenge: Creating a Structure

Introduction to GoLang

Data in StructsData in Structs

Now that we know how to create an instance of a structure, we should learn how to store and modify data in them.

We can use the dot (.) symbol followed by the field name to reference it. Consider the example in the following program, where we create an instance of the Student class called student1:

go

index.go

This is because no data was manually stored in the structure, causing each of the fields to take a default zero value based on its type.

Note

In Go, we cannot specify our own default values for the fields; it automatically assigns zero values to the fields based on their types. However, we can specify custom default values by creating a constructor function, which is beyond the scope of this course as it requires knowledge of pointers.

We can also reference and assign values to the fields using the same referencing method, for example:

go

index.go

Therefore, we can modify the program above to store some initial data accordingly:

go

index.go

Note

The fields of a struct are also referred to as members.

Which symbol do we use for accessing the struct members / fields:

Виберіть правильну відповідь

Все було зрозуміло?

Секція 6. Розділ 3
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