An in-depth exploration of numerical types in Go language

There are 4 integer types in the Go language, namely int, int8, int16 and int32, which are used to store integers without decimal parts. There are two types of floating point numbers: float32 and float64, which are used to store numbers with decimal parts. In addition, the Go language also provides two complex number types, complex64 and complex128, for storing complex numbers. The Boolean type bool is used to store true or false values. In actual combat, functions can be used for numerical type conversion, such as int(x) to convert float64 to int. It's crucial to master these numeric types in order to write efficient and accurate code.

In-depth discussion of numerical types in Go language

Introduction

Numerical types It is a crucial basic knowledge in Go language programming. They allow us to store and manipulate numerical data. This article takes an in-depth look at the various numeric types in Go, including integers, floats, complex numbers, and booleans.

Integer type

The integer type is used to store integers without decimal parts. There are four integer types in Go: int, int8, int16, and int32. They differ in scope and memory size. int64 is an additional integer type that needs to be imported from the "math/bits" package.

Floating point type

The floating point type is used to store numbers with decimal parts. There are two floating point types in Go: float32 and float64. float32 occupies 32 bits, while float64 occupies 64 bits.

Complex number type

The complex number type is used to store complex numbers, which contain real and imaginary parts. The complex number types in Go are complex64 and complex128, which correspond to 32-bit and 64-bit floating point numbers respectively.

Boolean type

The Boolean type is used to store true or false values. In Go, the boolean type is bool.

Practical case

Calculate the sum

func sum(numbers []int) int {
    total := 0
    for _, num := range numbers {
        total += num
    }
    return total
}

numbers := []int{1, 2, 3, 4, 5}
sumResult := sum(numbers)
fmt.Println("Sum:", sumResult) // 输出: Sum: 15

Conversion type

Sometimes Need to convert one numeric type to another type. Go provides a variety of functions for conversion, such as int(x) to convert float64 to int.

salary := 1000.50
intSalary := int(salary)
fmt.Println("Integer salary:", intSalary) // 输出: Integer salary: 1000

Conclusion

Numeric types are the cornerstone of storing and manipulating data in the Go language. Understanding the differences between types is critical to writing efficient and accurate code. This article explores the various numeric types in Go and provides practical examples to solidify your understanding.

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