My JS solution:

const S = readLine();
    
    try {
        Number.isInteger(Number(S)) || (() => { throw new Error(); })();
        console.log(S);
    } catch {
        console.log("Bad String");
    }

string S = Console.ReadLine();

Console.WriteLine(S.Any(c=> !(c >= 48 && c <= 57) || c==' ')?"Bad String":S);

                                             or

Console.WriteLine(Int32.TryParse(S, out int result)?result:"Bad String");

I'm using swift, and getting the same error over and over, did anyone knows how to solve it?

this is meu received error: Compiler Message Error reading result file.You should use exception handling concepts.

and this is my working code:

func stringToInt(inputString: String) throws -> Int {
    guard let value = Int(inputString) else {
        throw StringToIntTypecastingError.BadString
    }
    return value
}

I had to remove the "if name == 'main':"

#!/bin/python3

import math
import os
import random
import re
import sys

S = input()
try: 
    value = int(S) 
    print(value) 
except ValueError: 
    print("Bad String")

!/bin/python3

import math import os import random import re import sys if name == 'main': try: S = input() result = int(S) print(result) except ValueError: print("Bad String") except Exception: print("Bad String")