Basic types in Go 관련

The Go Handbook – Learn Golang for Beginners

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Golang is an awesome, simple, modern, and fast programming language. It’s compiled, open source, and strongly typed. Golang – also called Go – was created by Google engineers with these main goals: make their projects compile (and run) faster be sim...

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The Go Handbook – Learn Golang for Beginners

Golang is an awesome, simple, modern, and fast programming language. It’s compiled, open source, and strongly typed. Golang – also called Go – was created by Google engineers with these main goals: make their projects compile (and run) faster be sim...

Go is a typed language.

We saw how you can declare a variable, specifying its type:

var age int

Or you can let Go infer the type from the initial value assigned:

var age = 10

The basic types in Go are:

• Integers (int, int8, int16, int32, rune, int64, uint, uintptr, uint8, uint16, uint64)
• Floats (float32, float64), useful to represent decimals
• Complex types (complex64, complex128), useful in math
• Byte (byte), represents a single ASCII character
• Strings (string), a set of bytes
• Booleans (bool), either true or false

We have a lot of different types to represent integers. You will use int most of the time, and you might choose a more specialized one for optimization (not something you need to think about when you are just learning).

An int type will default to be 64 bits when used on a 64 bit system, 32 bits on a 32 bit system, and so on.

uint is an int that’s unsigned, and you can use this to double the amount of values you can store if you know the number is not going to be negative.

All the above basic types are value types, which means they are passed by value to functions when passed as parameters, or when returned from functions.