In-depth analysis of the application of % operator in Go language

Detailed explanation of the use of % operator in Go language, specific code examples are required

Introduction:
In Go language, % operator is a commonly used operation One of the symbols. Its function is to find the remainder of the division of two numbers. This article will discuss the use of the % operator in detail and give some specific code examples.

1. Basic usage of % operator
The % operator can be applied to operands of integer type (including int, int8, int16, int32, int64 and uint, uint8, uint16, uint32, uint64) , its function is to find the remainder of division. The specific expression form is:

a % b

where a and b are operands of integer type, and the result is the remainder of a divided by b.

Sample code:

package main

import "fmt"

func main() {
    a := 10
    b := 3
    fmt.Println(a % b)  // 输出：1

    c := 17
    d := 5
    fmt.Println(c % d)  // 输出：2
}

In the above code, the remainder of 10 divided by 3 is obtained through the % operator, and the result is 1; and the remainder of 17 divided by 5, the result is 2.

2. Application scenarios of the % operator
The % operator has a wide range of application scenarios in program development. Below we will introduce some common application scenarios.

1. Determine whether an integer is even or odd
   The% operator can be used to determine whether an integer is odd or even. If the remainder of dividing an integer by 2 is 0, then the integer is even; otherwise, it is odd.

Sample code:

package main

import "fmt"

func main() {
    num := 12
    if num % 2 == 0 {
        fmt.Println("偶数")
    } else {
        fmt.Println("奇数")
    }
}

In the above code, the value of num is set to 12, and the % operator is used to determine whether num is an even number, and the output result is "even number".

2. Limit an integer to a certain range
   The% operator can be used to limit an integer to a certain range. Through a % b, you can get the remainder of a divided by b, and the result of adding b will be between 0 and b-1. Using this feature, we can limit an integer to a certain range.

Sample code:

package main

import "fmt"

func main() {
    num := 28
    fmt.Println(num % 10)  // 输出：8

    num = num % 10
    fmt.Println(num)  // 输出：8
}

The above code sets the value of num to 28, which can be limited to between 0 and 9 by num % 10.

3. Determine whether a number is a multiple of another number
   The% operator can be used to determine whether a number is a multiple of another number. If a number a is divisible by another number b, that is, the result of a % b is 0, then a is a multiple of b.

Sample code:

package main

import "fmt"

func main() {
    a := 12
    b := 4
    if a % b == 0 {
        fmt.Println("a是b的倍数")
    } else {
        fmt.Println("a不是b的倍数")
    }
}

In the above code, the % operator is used to determine whether variable a is a multiple of variable b, and the output result is "a is a multiple of b".

Conclusion:
This article discusses the use of the % operator in Go language in detail and gives some specific code examples. The % operator can be used to find the remainder after dividing two numbers, and has a wide range of application scenarios in program development, including determining the parity of integers, limiting integers to a certain range, and determining whether one number is another Multiples of numbers, etc. I hope this article will help readers understand and master the % operator.

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