在 Go 语言中,字符串是用 UTF-8 编码的不可变的任意字节链。您可以使用两种不同的方式来比较字符串:
1。使用比较运算符: Go 字符串支持比较运算符,即 ==,!=,> =,< =,<,> 。在这里, == 和!= 运算符用于检查给定字符串是否相等,> =,< =,<,>运算符用于查找词法顺序。这些运算符的结果是布尔类型的,这意味着如果满足条件,它将返回真,否则,返回假。
例 1:
去
// Go program to illustrate the concept
// of == and != operator with strings
package main
import "fmt"
// Main function
func main() {
// Creating and initializing strings
// using shorthand declaration
str1 := "Geeks"
str2 := "Geek"
str3 := "GeeksforGeeks"
str4 := "Geeks"
// Checking the string are equal
// or not using == operator
result1 := str1 == str2
result2 := str2 == str3
result3 := str3 == str4
result4 := str1 == str4
fmt.Println("Result 1: ", result1)
fmt.Println("Result 2: ", result2)
fmt.Println("Result 3: ", result3)
fmt.Println("Result 4: ", result4)
// Checking the string are not equal
// using != operator
result5 := str1 != str2
result6 := str2 != str3
result7 := str3 != str4
result8 := str1 != str4
fmt.Println("\nResult 5: ", result5)
fmt.Println("Result 6: ", result6)
fmt.Println("Result 7: ", result7)
fmt.Println("Result 8: ", result8)
}
输出:
Result 1: false
Result 2: false
Result 3: false
Result 4: true
Result 5: true
Result 6: true
Result 7: true
Result 8: false
例 2:
去
// Go program to illustrate the concept
// of comparison operator with strings
package main
import "fmt"
// Main function
func main() {
// Creating and initializing
// slice of string using the
// shorthand declaration
myslice := []string{"Geeks", "Geeks",
"gfg", "GFG", "for"}
fmt.Println("Slice: ", myslice)
// Using comparison operator
result1 := "GFG" > "Geeks"
fmt.Println("Result 1: ", result1)
result2 := "GFG" < "Geeks"
fmt.Println("Result 2: ", result2)
result3 := "Geeks" >= "for"
fmt.Println("Result 3: ", result3)
result4 := "Geeks" <= "for"
fmt.Println("Result 4: ", result4)
result5 := "Geeks" == "Geeks"
fmt.Println("Result 5: ", result5)
result6 := "Geeks" != "for"
fmt.Println("Result 6: ", result6)
}
输出:
Slice: [Geeks Geeks gfg GFG for]
Result 1: false
Result 2: true
Result 3: false
Result 4: true
Result 5: true
Result 6: true
2。使用 compare()方法:还可以使用字符串包提供的内置函数 Compare()来比较两个字符串。此函数在按字典顺序比较两个字符串后返回一个整数值。返回值为:
- 如果 str1 == str2 ,则返回 0。
- 如果 str1 > str2 ,返回 1。
- 返回-1,如果 str1 < str2 。
语法:
func Compare(str1, str2 string) int
示例:
去
// Go program to illustrate how to compare
// string using compare() function
package main
import (
"fmt"
"strings"
)
func main() {
// Comparing string using Compare function
fmt.Println(strings.Compare("gfg", "Geeks"))
fmt.Println(strings.Compare("GeeksforGeeks",
"GeeksforGeeks"))
fmt.Println(strings.Compare("Geeks", " GFG"))
fmt.Println(strings.Compare("GeeKS", "GeeKs"))
}
输出:
1
0
1
-1