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How to convert a string to an int in Go
Dario Vincenzo Tarantini
In Go, you can use the Atoi function in the strconv package to convert a numeric string to an integer.
Note: This function returns an int in base 10. It is equivalent to
ParseInt(s, 10, 0).
Visual rappresentation of Atoi function
Syntax
func Atoi(s string) (int, error)
Parameters
Atoi takes a valid numeric string as a parameter.
Return value
If the conversion succeeds, the function will return a nil error and the int we are searching for; otherwise, it will return an error.
Example
package main
import (
"fmt"
"strconv"
)
func main() {
// in this case, we want to convert
// the string '10' to the int 10
s, err := strconv.Atoi("10");
if err != nil {
fmt.Println("Can't convert this to an int!")
} else {
fmt.Println(s)
}
// we can also convert negative numbers
s1, err1 := strconv.Atoi("-2");
if err1 != nil {
fmt.Println("Can't convert this to an int!")
} else {
fmt.Println(s1)
}
// now, we will try to convert a not valid
// string and handle the error
s2, err2 := strconv.Atoi("Hello educative!");
if err2 != nil {
fmt.Println("Can't convert this to an int!")
}else{
fmt.Println(s2)
}
}RELATED TAGS
go
communitycreator
CONTRIBUTOR
Dario Vincenzo Tarantini
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