In Go language, the string is an immutable chain of arbitrary bytes encoded with UTF-8 encoding. You are allowed to compare strings with each other using two different ways:
1. Using comparison operators: Go strings support comparison operators, i.e, ==, !=, >=, <=, <, >. Here, the == and != operator are used to check if the given strings are equal or not, and >=, <=, <, > operators are used to find the lexical order. The results of these operators are of Boolean type, meaning if the condition is satisfied it will return true, otherwise, return false.
Example 1:
// 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)
} |
Output:
Result 1: false Result 2: false Result 3: false Result 4: true Result 5: true Result 6: true Result 7: true Result 8: false
Example 2:
// 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)
} |
Output:
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. Using Compare() method: You can also compare two strings using the built-in function Compare() provided by the strings package. This function returns an integer value after comparing two strings lexicographically. The return values are:
- Return 0, if str1 == str2.
- Return 1, if str1 > str2.
- Return -1, if str1 < str2.
Syntax:
func Compare(str1, str2 string) int
Example:
// 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" ))
} |
Output:
1 0 1 -1