Different ways to compare Strings in Golang

08 Oct, 2020
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
// Go program to illustrate the concept// of == and != operator with stringspackage main import "fmt" // Main functionfunc 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
// Go program to illustrate the concept// of comparison operator with stringspackage main import "fmt" // Main functionfunc 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
// Go program to illustrate how to compare// string using compare() functionpackage 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

becca1
Golang
Golang-String
Go Language
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