How to compare two Strings in GoLang | GoLang Tutorial
5 years ago Lalit Bhagtani 0
In this tutorial, we will learn about how to compare two strings in Go programming language.
Comparison Operators
The comparison operators like ==, != can be use to compare two strings. Operators works in the following way :-
- == :- It returns true, if both strings are equal otherwise it returns false.
- != :- It returns false, if both strings are equal otherwise it returns true.
Syntax
(a string) Operator (b string)
Example
package main
import (
"fmt"
)
func main() {
var (
a string = "Robert"
b string = "Robert"
c string = "john"
)
fmt.Println(a == b)
fmt.Println(a != b)
fmt.Println(a == c)
fmt.Println(a != c)
}
Output
true
false
false
true
String Compare
Two strings can be compare using Compare() function provided in the strings package. This function compares two string (a and b) lexicographically. It returns 0, if both strings are equal (a == b), -1 if first string is lesser than second string (a < b) and 1 if first string is greater than second string (a > b).
Syntax
func Compare(a, b string) int
Example
package main
import (
"fmt"
"strings"
)
func main() {
var (
a string = "Robert"
b string = "Robert"
c string = "john"
)
fmt.Println(strings.Compare(a, b))
fmt.Println(strings.Compare(a, c))
fmt.Println(strings.Compare(c, a))
}
Output
0
-1
1
String EqualFold
The function EqualFold() provided in the strings package checks the equality of two strings. It compares two strings by ignoring their cases. It returns true, if both strings are equal (a == b) and returns false, if both strings are not equal.
Syntax
func EqualFold(a, b string) bool
Example
package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println(strings.EqualFold("ROBERT", "ROBERT"))
fmt.Println(strings.EqualFold("ROBERT", "robert"))
fmt.Println(strings.EqualFold("ROBERT", "john"))
fmt.Println(strings.EqualFold("ROBERT", "rObErT"))
}
Output
true
true
false
true
References
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