Basic data types in Go - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an int in Go?

An int is a basic data type in Go used to store whole numbers without decimals, like 1, 42, or -7.

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What does the float64 type represent?

float64 is a data type for numbers with decimals, like 3.14 or -0.001. It uses 64 bits to store the value.

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What is the string type used for in Go?

string stores text, like words or sentences, for example "hello" or "Go programming".

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What is a bool type?

bool holds a value that is either true or false. It is used for yes/no or on/off decisions.

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How do you declare a variable of type int in Go?

You can declare an int variable like this: var age int = 30. This creates a variable named age that holds the number 30.

Which Go data type would you use to store the number 42?

A string

B int

C bool

D float64

The number 42 is a whole number, so the int type is the best choice.

What value can a bool type hold?

A true or false

B Text strings

C Any number

D Decimal numbers

A bool type can only be true or false.

Which type is best for storing the text "hello"?

A float64

B int

C bool

D string

Text like "hello" is stored in a string type.

What is the difference between int and float64?

A int stores true/false, float64 stores numbers

B int stores text, float64 stores numbers

C int stores whole numbers, float64 stores decimal numbers

D int stores decimal numbers, float64 stores whole numbers

int is for whole numbers, float64 is for numbers with decimals.

How do you declare a variable named 'score' with value 100 as an int?

A var score int = 100

B score := "100"

C var score string = 100

D score = 100.0

The correct way is 'var score int = 100' to declare an int variable.

Explain the main basic data types in Go and give an example of each.

Think about numbers, text, and true/false values.

How do you declare and assign a variable of type string in Go?

Use 'var' and '=' to create the variable.