For a better understanding of this example, we always recommend you to learn the basic topics of Golang programming listed below:
If you want to know if a character is a Unicode letter or digit, then use the Character. isLetter and Character. isDigit methods.
func IsDigit(r rune) bool
IsDigit reports whether the given rune is a decimal digit
Here we are showing how to check the character is a digit in the Go language. Here variable chr is used to hold the read character. For reading the character create the reader using NewReader. Check the character read is a digit or not by using unicode.IsDigit(chr). Finally print the results. Given below are the steps which are used in the Go program.
STEP 1: Import the package fmt, bufio, os, unicode
STEP 2: Start function main()
STEP 3: Create a reader using NewReader as reader := bufio.NewReader(os.Stdin)
STEP 4: Read the character into variable chr as chr, _, _ := reader.ReadRune()
STEP 5: Check the character is an alphabet or not by using unicode.IsDigit(chr)
STEP 6: Use if statement for printing proper message
package main
import (
"bufio"
"fmt"
"os"
"unicode"
)
func main() {
reader := bufio.NewReader(os.Stdin)
fmt.Print("Enter any character to be checked = ")
chr, _, _ := reader.ReadRune()
if unicode.IsDigit(chr) {
fmt.Printf("%c is a Digit\n", chr)
} else {
fmt.Printf("%c is not a Digit\n", chr)
}
}
Enter any character to be checked = 6 6 is a Digit Enter any character to be checked = c c is not a Digit
