When to use try catch code example

Example 1: try catch haxe

import haxe.Exception;

class Main {
  static function main() {
    try {
      try {
        doSomething();
      } catch(e:Exception) {
        trace(e.stack);
        throw e; //rethrow
      }
    } catch(e:Exception) {
      trace(e.stack);
    }
  }

  static function doSomething() {
    throw new Exception('Terrible error');
  }
}

Example 2: try catch exception

First try block try to handle it
if not then catch block will handle it.
Finally block will executed regardless
of the outcome

Example 3: try/catch

var x = 7, y = 7;try {  if(x == y){    throw "errorOne";  }else{    throw "errorTwo";  }} catch(e) {  if(e == "errorOne"){   console.log("Same")}  if(e == "errorTwo")   console.log("Different)}

Example 4: try catch error

// Main program passes in two ints, checks for errors / invalid input
// using template class type T for all variables within functions
#include <iostream>
using namespace std;

template <class T> // make function return type template (T)
void getMin(T val1, T val2)
{
    try
    {
        if (val1 < val2) // if val1 less than return it as min
            cout << val1 << " is the minimum\n";
        else if (val1 > val2)
            cout << val2 << " is the minimum\n";
        else 
            throw 505; // exception error processing when input is invalid
    }
    catch(T my_ERROR_NUM)
    {
        cout << "Input is invalid, try again. "; // first part of error message
    }
}

template <class T>
void getMax(T val1, T val2) // make function return type template (T)
{
    try
    {
        if (val1 > val2) // if val1 greater then return it as max
            cout << val1 << " is the maximum\n\n";
        else if (val1 < val2)
            cout << val2 << " is the maximum\n\n";
        else
            throw 505; // exception error processing when input is invalid
    }
    catch (T random_num)
    {
        cout << "Error 505!\n\n"; // Second part of error messagee
    }
}