Reveal the operator priority of Go language and reveal the secret of the highest priority

Explore the operator priority of Go language and reveal the secret of the highest priority

Go language is a simple, efficient, concurrency-safe programming language. Its goal is Provides an elegant way to solve problems in software development. In the Go language, operator precedence determines the order in which operators in an expression are evaluated. Correct understanding and use of operator precedence is very important for writing reliable code. This article will explore operator precedence in the Go language and reveal the secret of the highest precedence.

The operator precedence of Go language can be divided into the following levels from high to low: brackets (), unary operators, -,! , ^, *, &, , —, type conversion, multiplication and division, remainder, addition and subtraction, shift, bit operation, comparison, logical operation, bit clearing operator &^, assignment. Among them, parentheses () have the highest priority, and the assignment operator has the lowest priority.

Let us show the precedence of Go language operators through specific code examples. Consider the following code snippet:

package main

import "fmt"

func main() {
    a := 10
    b := 5
    c := 2

    result := a + b*c

    fmt.Println(result)
}

In this code, we have defined three variables a, b and c, which are initialized to 10 , 5 and 2. We then evaluate them using the and * operators and assign the result to the result variable. Finally, we print the result through the fmt.Println() function.

According to the operator priority rules of the Go language, the multiplication operator * has a higher priority than the addition operator . Therefore, b*c is calculated first to get 10. Then, add it to a to get 20. Finally, by assigning the result to the result variable, we get the correct calculation result.

In the Go language, a correct understanding of operator precedence is crucial to writing high-quality code. When we write complex expressions, we must have a clear understanding of operator precedence to ensure that the expression is evaluated in the order expected.

In addition to operator precedence, the Go language also provides parentheses to clearly specify the order of operations. For example, if we want to first calculate a b in the above code, and then multiply the result with c, we can use parentheses to explicitly specify the order of operations, the code is as follows:

result := (a + b) * c

By explicitly specifying the order of operations within parentheses, we ensure that addition operations are performed first and then multiplication operations. In this way, we can get different calculation results than before.

In summary, the priority of operators in the Go language determines the order of calculation of each operator in an expression. Correctly understanding and applying operator precedence is key to writing high-quality code. Through practical code examples, we explore the use of operator precedence in Go and reveal the secret of highest precedence. I hope this article can bring some inspiration to readers about Go language operator precedence and help them better understand and apply this feature.

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