# Check Digit ## Write a program to check digit Check wether given character is a digit (0-9). ```txt Input : 1 Output : Digit ``` --- ```c #include /* printf, scanf */ int IsDigit(char check_me); int main() { char check_me = 0; int is_good = scanf("%c",&check_me); if(is_good != 1) { return -1; } is_good = IsDigit(check_me); if(is_good) { printf("Digit\n"); } else { printf("Not a digit\n"); } return 0; } int IsDigit(char check_me) { return ((check_me >= '0') && (check_me <= '9')) ? 1 : 0; } ``` ```cpp #include using namespace std; int main(){ char ch; cin>>ch; if(ch>='0' && ch<='9') cout<<"Digit"<<'\n'; else cout<<"Not Digit"<<'\n'; return 0; } //Contributed by Raghav Garg ``` ```csharp using System; public class CheckDigit { public static void Main(string[] args) { Console.Write("Enter the character: "); var c = Console.ReadLine(); var isDigit = int.TryParse(c, out var value) && (0 <= value) && (9 >= value); Console.WriteLine(isDigit ? "Entered character is a digit" : "Entered character is not a digit"); } } ``` ```java import java.util.Scanner; public class CheckDigit { public static void main(String[] args) { Scanner sc = new Scanner(System.in); char ch = sc.nextLine().charAt(0); sc.close(); if (ch >= '0' & ch <= '9') { System.out.println("Digit"); } else { System.out.println("Not a Digit"); } } } ``` ```javascript function isNumDigit(dig) { return /^[0-9]$/.test(dig) ? "Yes, digit" : "No, not a digit"; } console.log(isNumDigit("1")); console.log(isNumDigit("w")); console.log(isNumDigit("6.9")); ``` ```kotlin import java.util.Scanner fun main() { print("Enter input : ") println() var input = readLine() println("$input is a : " + CheckIsDigit(input!!)) } private fun CheckIsDigit(str: String): String { val chars = str.toCharArray() for (x in chars) { if(!x.isDigit()){ return "not a Digit" } } return "Digit" } ``` ```ruby #Author: suryapoojary0 #Date: "13-10-2022" puts "Input a digit to check if it's a digit" #check_digit function checks if the num is a digit or not a digit. num = gets.to_i def check_digit(num) unless num >= 10 puts "Digit" else puts "Not a Digit" end end #call thr function check_digit(num) ``` ```swift import Swift import Foundation extension String { var isNumeric: Bool { return !isEmpty && range(of: "[^0-9]", options: .regularExpression) == nil } } print("1".isNumeric) //true print("9".isNumeric) //true print("A".isNumeric) //false print("a".isNumeric) //false print("&".isNumeric) //false ``` ```typescript function isNumDigitTS(dig: string) { return /^[0-9]$/.test(dig) ? "Yes, digit" : "No, not a digit"; } console.log(isNumDigitTS("1")); console.log(isNumDigitTS("w")); console.log(isNumDigitTS("6.9")); ``` ```julia print("Enter a number : ") num = readline(stdin) if tryparse(Float64, num) !== nothing println("Digit") else println("Not a Digit") end ``` ```scala object checkDigit { def main(args:Array[String]) { val result = '1'.isDigit println(result) } } ``` ```go package main import ( "fmt" "log" ) func main() { var input string fmt.Printf("Enter the value of your choice: ") fmt.Scanf("%s", &input) if len(input) == 0 { log.Println("Looks like you didn't enter anything. Please enter a digit to continue!") return } if len(input) > 1 { log.Println("Please enter only one digit!") return } // ASCII Values for- // 0-9 45-57 for _, v := range input { if v >= 45 && v <= 57 { fmt.Println("Input is a DIGIT!") } else { fmt.Println("Input is NOT a digit!") } } } ``` ```php ``` ```perl $x = 1; if (length(do { no warnings "numeric"; $x & "" })){ print "Digit\n"; } else { print "Not a digit\n"; } ``` ```python # Checks if the input number num = input("Enter a number: ") # Solution def checDigit(num): try: (int(num)) return True except ValueError: return False if checDigit(num): print("Digit") else: print("Not Digit") ```

Check Digit

Write a program to check digit

Contributors

Become a Sponsor