Detailed explanation of operator priority ordering in Go language

Priority ordering of operators in Go language

In Go language, there are some operators used to perform various operations, such as arithmetic operations, logical operations, Bit operations, etc. These operators all have different precedence, and understanding the precedence of these operators is one of the keys to writing efficient and accurate code. This article will discuss the precedence of various operators in the Go language in detail and demonstrate it with specific code examples.

1. Arithmetic operators:
In the Go language, the priority of arithmetic operators from high to low is: brackets () > unary operators ( , -) > multiplication ( *, /, %) > addition ( , -).

For example, we can verify the precedence of arithmetic operators through the following code:

package main

import "fmt"

func main() {
    a, b, c := 10, 5, 2
    result := a + b*c
    fmt.Println("Result of a + b*c is:", result)  // 预期输出：20
}

In the above code, since the precedence of the multiplication operator is higher than the addition operator, so first Execute b*c, and then add it to a to get the final result.

2. Logical operators:
In the Go language, the priority of logical operators from high to low is: ! > && > ||.

The following code demonstrates the priority of logical operators:

package main

import "fmt"

func main() {
    a, b, c := true, false, true
    result := a && b || c
    fmt.Println("Result of a && b || c is:", result)  // 预期输出：true
}

In the above code, since the logical AND operator && has a higher priority than the logical OR operator ||, so First execute a && b, and then perform logical OR operation with c to get the final result.

3. Bitwise operators:
In the Go language, the priority of bitwise operators from high to low is: ^ > & > |.

The following is a demonstration of the precedence of bitwise operators:

package main

import "fmt"

func main() {
    a := 5
    result := a &^ 3 | 1
    fmt.Println("Result of a &^ 3 | 1 is:", result)  // 预期输出：4
}

In the above code, since the bitwise clear operator &^ has a higher precedence than the bitwise OR operator |, So first execute a &^ 3, and then perform a bitwise OR operation with 1 to get the final result.

Summary: Understanding operator precedence is an important step in writing efficient and accurate code. This article details the precedence of arithmetic operators, logical operators, and bitwise operators in the Go language and demonstrates it with specific code examples. I hope this article can help readers better understand operator precedence in Go language.

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