Understand the use of the modulo operator % in Go language

To explore the meaning of operator % in Go language, you need specific code examples

In Go language, operator % is a modulo operator, used to find two The remainder of an integer. Its usage format is a % b, where a and b are two integers.

Below we will further explore the meaning of the % operator through several specific code examples.

package main

import "fmt"

func main() {
    // 示例1：求一个整数除以另一个整数的余数
    var a, b int
    a = 10
    b = 3
    fmt.Printf("%d %% %d = %d
", a, b, a%b) // 输出：10 % 3 = 1

    // 示例2：求一个整数是否为偶数
    var num int
    num = 13
    if num%2 == 0 {
        fmt.Printf("%d是偶数
", num)
    } else {
        fmt.Printf("%d是奇数
", num) // 输出：13是奇数
    }

    // 示例3：判断一个年份是否为闰年
    var year int
    year = 2020
    if year%400 == 0 || (year%4 == 0 && year%100 != 0) {
        fmt.Printf("%d年是闰年
", year) // 输出：2020年是闰年
    } else {
        fmt.Printf("%d年不是闰年
", year)
    }
}

In Example 1, we use the % operator to find the remainder of 10 divided by 3, and the output result is 1. This shows that the remainder when 10 is divided by 3 is 1.

In Example 2, we determine whether an integer is an even number by determining whether the remainder is 0 when it is divisible by 2. If the remainder of num modulo 2 is 0, it is an even number, otherwise it is an odd number.

In Example 3, we use the % operator to determine whether a year is a leap year. According to regulations, a year that is divisible by 400 is a leap year, and a year that is divisible by 4 but not divisible by 100 is also a leap year. So we use the % operator to determine whether year is divisible by 400, or whether it is divisible by 4 but not by 100.

Through the above code example, we can see the specific usage and meaning of the % operator in Go language. It can be used to find the remainder of dividing an integer by another integer, to determine whether an integer is an even number, to determine whether a year is a leap year, etc. In actual development, we can flexibly use the % operator to solve problems according to specific needs.

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