An in-depth introduction to int division operation in Golang

The int division operation in Golang is a basic operation in programming, but it may be a little confusing for beginners. This article will provide an in-depth introduction to the relevant knowledge of int division operation in Golang.

1. Basic concepts

1.1 What is int

int is a data type that represents an integer. In Golang, the size of int is platform-dependent, usually 32-bit or 64-bit.

1.2 What is division

Division is a basic arithmetic operation. It is the process of dividing the divisor by the dividend to obtain the quotient. For example, 6 divided by 3 equals 2 and can be expressed as 6/3=2.

2. Int division operation

In Golang, there are two ways of int division operation: integer division and floating point division.

2.1 Integer division

Integer division refers to the operation of dividing two integers. For example, 5 is divided by 2. Since it is not divisible, integer division only retains the integer part of the quotient, which is 2.

The sample code is as follows:

package main

import "fmt"

func main() {
    var a, b int = 5, 2
    c := a / b
    fmt.Println(c)
}

The output result is:

2

2.2 Floating point division

Floating point division refers to the division of two floating point numbers operate. In Golang, floating-point division preserves the number of decimal points in the division result and returns the result as a floating-point number.

The sample code is as follows:

package main

import "fmt"

func main() {
    var a, b float64 = 5.0, 2.0
    c := a / b
    fmt.Println(c)
}

The output result is:

2.5

Note: When performing floating-point division, as long as either the dividend or the divisor is of floating-point type, Will return a floating point number type result.

3. Precautions for int division operation

When performing int division operation, there are the following points to pay attention to:

3.1 The divisor cannot be 0

When performing int division operation, the divisor cannot be 0, otherwise a division by 0 error will occur.

The sample code is as follows:

package main

import "fmt"

func main() {
    var a, b int = 5, 0
    c := a / b
    fmt.Println(c)
}

The output result is:

runtime error: integer divide by zero

3.2 Modulo operation

When performing integer division operation, you can use the modulo operation symbol % to obtain the remainder of division. For example, the quotient of 5 divided by 2 is 2 and the remainder is 1. Therefore, it can be expressed as: 5%2=1.

The sample code is as follows:

package main

import "fmt"

func main() {
    var a, b int = 5, 2
    c := a % b
    fmt.Println(c)
}

The output result is:

1

3.3 floor function

When performing floating point division operation, sometimes it is necessary to perform the result Rounding operation. The math package in Golang provides the floor function to implement downward rounding.

The sample code is as follows:

package main

import (
    "fmt"
    "math"
)

func main() {
    var a, b float64 = 5.0, 2.0
    c := math.Floor(a / b)
    fmt.Println(c)
}

The output result is:

2

The above is the detailed introduction and precautions of this article on the int division operation in Golang. I hope to be helpful.

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