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C# Full Course for free/8.Control Flow.md

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+# Condition
+
+## if / else
+
+```C#
+Console.WriteLint("Please enter your age: ");
+int age = Convert.ToInt32(Console.ReadLine());
+
+if (age > 100){
+    Console.WriteLine("You are to old to signed up! ");
+}
+else if(age >= 18){
+    Console.WriteLine("You are now signed up! ");
+}
+else if (age < 0){
+    Console.WriteLine("You are not born yet! ");
+}
+else{
+    Console.WriteLine("You must be 18+ to sing up! ");
+}
+```
+
+```C#
+Console.WriteLint("Please enter your name : ")
+String name = Console.ReadLine()
+
+if (name != ""){
+    Console.WriteLine("hello : " + name);
+}else{
+    Console.WriteLine("You did not enter your name !" );
+}
+
+```
+
+## switch
+
+```C#
+Console.WriteLint("What day is it today ?");
+String day = Console.ReadLine();
+
+switch(day)
+{
+    case "Monday":
+        Console.WriteLine("It's Moday!")
+        break;
+    case "Tuesday":
+        Console.WriteLine("It's Tuesday!")
+        break;
+    case "Wednesday":
+        Console.WriteLine("It's Wednesday!")
+        break;
+    case "Thursday":
+        Console.WriteLine("It's Thursday!")
+        break;
+    case "Friday":
+        Console.WriteLine("It's Friday!")
+        break;
+    case "Saturday":
+        Console.WriteLine("It's Friday!")
+        break;
+    case "Sunday":
+        Console.WriteLine("It's Friday!")
+        break;
+    default:
+        Console.WriteLine(day + "is not a day")
+        break;
+}
+
+```
+
+## Logical Operator
+
+can be used to check if more than 1 condition is true / false
+&& (AND)
+|| (OR)
+
+```C#
+Console.WriteLine("What's the temperature outside");
+double temp = Convert.ToDouble(Console.ReadLine());
+
+if(temp >= 10 && temp <= 25){
+    Console.WriteLine("It's warm outside");
+}else if(temp <= -50 || temp >= 50){
+    Console.WriteLine("DO NOT GO OUTSIDE !");
+}
+```
+
+## try / catch / exception
+
+errors that occur during execution
+
+try = try some code that is considered "dangerous"
+catch = catches and handles execptions when they occur
+finally = always executes regardless if exception is caught or not
+
+```C#
+double x;
+double y;
+double result;
+
+try 
+{ 
+    Console.Write("Enter number 1: ");
+    x = Convet.ToDouble(Console.ReadLine());
+
+    Console.Write("Enter number 2: ");
+    y = Convet.ToDouble(Console.ReadLine());
+
+    result = x / y;
+
+    Console.WriteLine("result: " + result);
+
+}
+catch(FormatExecption e)
+{
+    Console.WriteLine("Enter ONLY numbers Please!");
+}
+catch(DivideByZeroExecption e)
+{
+    Console.WriteLine("you can't divide by zero");
+}
+catch ( Exeption e)
+{
+    Console.WriteLine("something went wrong !");
+}
+finally
+{
+    Console.WriteLine("Tanks for visiting");
+}
+```
+
+## Conditional Operator
+
+// (condition) ? y : x
+
+```C#
+double temperature = 20;
+Console.WriteLine((tempure >= 15) ? "It's warm outside!" : "It's cold outside!"; )
+```