feat(#1518): check alphabet go

program/check-alphabet/check_alphabet.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	"regexp"
+)
+
+var isAlphabet = regexp.MustCompile(`^[a-zA-Z]`).MatchString
+
+func main() {
+	var str string
+	fmt.Print("Input a character: ")
+	fmt.Scan(&str)
+
+	if (isAlphabet(str)) {
+		fmt.Println("Alphabet")
+	} else {
+		fmt.Println("Non Alphabet")
+	}
+}