Necessary knowledge to learn Go language operator precedence requires specific code examples
1. Introduction
For beginners, master Operator precedence in programming languages is very important. In Go language, the precedence of operators determines the order in which expressions are evaluated. Correctly understanding and using operator precedence can help us write efficient and readable code. This article will introduce the commonly used operator precedence in the Go language and explain it through specific code examples.
2. Go language operator priority
The operator priority of Go language is generally similar to other languages, and mainly consists of the following levels:
1. Unary operators
This level includes operators such as negation (-), positivity ( ), increment ( ), and decrement (--). Their associativity is from right to left.
2. Multiplication, division and modulo operators (Multiplicative operators)
This level includes multiplication (*), division (/) and modulo (%) operators . Their associativity is from left to right.
3.Additive operators
This level includes addition ( ) and subtraction (-) operators. Their associativity is from left to right.
4. Shift operators
This level includes left shift (>) operators . Their associativity is from left to right.
5. Relational operators 6.Equality operators 7. Bitwise AND operator (Bitwise AND operator) 8. Bitwise XOR operator (Bitwise XOR operator) 9. Bitwise OR operator (Bitwise OR operator) 10. Logical AND operator 11. Logical OR operator 12. Assignment operators 13. Comma Operator (Comma Operator) 3. Code examples The following uses specific code examples to illustrate the use of operator precedence: Unary operator examples Examples of multiplication, division and modulus operators Examples of addition and subtraction operators Relational operations Operator example Through the above examples, we can clearly see the difference in priority and associativity of different operators in expressions. Mastering these precedence rules can help us accurately Calculate and predict the output of the code to improve the readability and accuracy of the code. 4. Summary In the Go language, correctly understanding and using operator precedence is essential knowledge for becoming a qualified programmer. This article introduces the commonly used operator precedence in the Go language and explains it with specific code examples. I hope that readers can master these operator precedence rules through studying this article and be able to use them flexibly in actual programming. I wish readers continuous progress in learning and developing Go language!
This level includes greater than (>), less than (=), Less than or equal to (
This level includes equal (==) and not equal (!=) operators. Their associativity is from left to right.
This level includes the bitwise AND (&) operator. Their associativity is from left to right.
This level includes the bitwise XOR (^) operator. Their associativity is from left to right.
This level includes the bitwise OR (|) operator. Their associativity is from left to right.
This level includes the logical AND (&&) operator. Their associativity is from left to right.
This level includes the logical OR (||) operator. Their associativity is from left to right.
This level includes the assignment (=) operator. Their associativity is from right to left.
This level includes the comma (,) operator. Their associativity is from left to right. package main
import "fmt"
func main() {
a := 5
// 递增运算符
a++
fmt.Println(a) // 输出:6
// 递减运算符
a--
fmt.Println(a) // 输出:5
// 取反运算符
b := -a
fmt.Println(b) // 输出:-5
// 取正运算符
c := +a
fmt.Println(c) // 输出:5
}
package main
import "fmt"
func main() {
a := 10
b := 3
// 乘法运算符
c := a * b
fmt.Println(c) // 输出:30
// 除法运算符
d := a / b
fmt.Println(d) // 输出:3
// 取模运算符
e := a % b
fmt.Println(e) // 输出:1
}
package main
import "fmt"
func main() {
a := 5
b := 3
// 加法运算符
c := a + b
fmt.Println(c) // 输出:8
// 减法运算符
d := a - b
fmt.Println(d) // 输出:2
}
package main
import "fmt"
func main() {
a := 5
b := 3
// 大于运算符
c := a > b
fmt.Println(c) // 输出:true
// 小于等于运算符
d := a <= b
fmt.Println(d) // 输出:false
}
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