Correct understanding and application skills of operator priority sorting in Go language

How to correctly understand and apply the priority ordering of Go language operators

As a powerful and flexible programming language, Go language provides many operators to implement Various computational operations. In order to write code correctly, we need to understand and accurately apply operator precedence. This article will introduce commonly used operators in the Go language and give corresponding code examples to help readers deeply understand and correctly apply priority sorting.

1. Arithmetic operators
   Go language provides basic arithmetic operators such as addition ( ), subtraction (-), multiplication (*), division (/) and modulo (%). Their precedence from high to low is:
2. Expressions in brackets
3. Unary operators, such as positive and negative signs (and -)
4. Multiplication, division and modulus
5. Addition and subtraction

Code example:

package main

import "fmt"

func main() {
    x := ((10 + 5) * 2) / 3
    fmt.Println(x) // 输出为10
}

2. Relational operators
   Relational operators in Go language are used for comparisons The commonly used relationships between two values ​​are equal to (==), not equal to (!=), greater than (>), less than (<), greater than or equal to (>=), and less than or equal to (<=). The precedence of relational operators is similar to that of arithmetic operators, and they are evaluated from left to right in an expression.

Code Example:

package main

import "fmt"

func main() {
    a, b := 5, 10
    x, y, z := a > b, a + b == a * b, a <= b
    fmt.Println(x, y, z) // 输出为false false true
}

3. Logical Operators
   Logical operators are used to combine multiple conditions and return a Boolean value. Commonly used logical operators include logical AND (&&), logical OR (||) and logical NOT (!). When calculating logical expressions, Go language first calculates logical negation, then calculates logical AND, and finally calculates logical OR.

Code example:

package main

import "fmt"

func main() {
    a, b := 5, 10
    x, y, z := a > 0 && b > 0, a < 0 || b < 0, !(a == b)
    fmt.Println(x, y, z) // 输出为true true true
}

4. Assignment operator
   The assignment operator is used to assign a value to a variable. Commonly used assignment operators include direct assignment (=), additive assignment (=), subtractive assignment (-=), multiplicative assignment (*=), and division assignment (/=). The assignment operator has lower precedence than most operators, so special care should be taken in expressions.

Code example:

package main

import "fmt"

func main() {
    x := 5
    x += 10
    fmt.Println(x) // 输出为15
}

5. Other operators
   In addition to the above commonly used operators, the Go language also provides some other operators, such as bit operations operators, pointer operators and conditional operators, etc. The precedence of these operators is relatively independent from other operators, and they need to be used flexibly according to the situation.

By deeply understanding and correctly applying operator precedence, we can write clearer and more efficient Go code. This article gives the priority ordering of commonly used operators and provides corresponding code examples, hoping to help readers master the correct use of operators in the Go language.

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