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How to check if a string is empty in Golang
Shubham Singh KshatriyaOverview
In this shot, we will learn to check if a string is empty or not.
In Golang, we can do this by:
- Comparing it with an empty string.
- Evaluating the length of the string; if it’s zero, then the string is empty, and vice versa.
Example 1
The code below shows how to check if a string is empty by comparing it with an empty string:
package main
import (
"fmt"
)
func main() {
// initialize an empty and a non-empty string
str1 := ""
str2 := "edpresso"
if str1 == "" {
// will be printed on the console, since str1 is empty
fmt.Println("String 1 is empty")
}
if str2 == "" {
// will be skipped, since str2 is not empty
fmt.Println("String 2 is empty")
}
}Comparing with an empty string
Example 2
The code below shows how to check if a string is empty by evaluating the length of the string:
package main
import (
"fmt"
)
func main() {
// initialize an empty and a non-empty string
str1 := ""
str2 := "edpresso"
if len(str1) == 0 {
// will be printed on the console, since str1 is empty
fmt.Println("String 1 is empty")
}
if len(str2) == 0 {
// will be skipped, since str2 is not empty
fmt.Println("String 2 is empty")
}
}Evaluating length of the string
Note: If a string contains only white spaces, we can use the
TrimSpace()method to remove them before checking if it’s empty or not.
RELATED TAGS
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go
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