#509 Day 6-switch content added

docs/day-06/switch.md

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+---
+sidebar_position: 5
+title: "Switch Statement in C++"
+description: "In this tutorial, we will learn about the switch Statements in C++ programming with the help of examples. The switch statement in C++ is a flow control statement ."
+sidebar_label: "Switch Statement in C++"
+slug: switch statement
+---
+# Switch Statement in C++
+
+This repository provides an explanation of switch statements in C++, along with examples of their usage.
+
+## Table of Contents
+
+- [Introduction](#introduction)
+- [Basic switch Statement](#basic-switch-statement)
+- [switch Statement](#switch-statement)
+- [Rules for switch Statement](#Rules-of-the-switch-case-statement)
+- [Working  of switch Statement](#Working-of-switch-Statement)
+- [Example of switch Statement](#example)
+
+## Introduction
+
+The C++ Switch case statement evaluates a given expression and based on the evaluated value(matching a certain condition), it executes the statements associated with it. It is an alternative to the long if-else-if ladder which provides an easy way to dispatch execution to different parts of code based on the value of the expression.
+
+## Basic switch Statement
+
+```cpp
+switch (expression) {
+    case value_1:
+        // statements_1;
+        break;
+    case value_2:
+        // statements_2;
+        break;
+    .....
+    .....
+    default:
+        // default_statements;
+        break;
+}
+```
+
+
+## Rules of the switch case statement
+
+```cpp
+There are some rules that we need to follow when using switch statements in C++. They are as follows:
+
+-The case value must be either int or char type.
+-There can be any number of cases.
+-No duplicate case values are allowed.
+-Each statement of the case can have a break statement. It is optional.
+-The default Statement is also optional.
+
+```
+
+
+## Working of switch Statement
+
+```cpp
+The working of the switch statement in C is as follows:
+
+-Step 1: The switch expression is evaluated.
+-Step 2: The evaluated value is then matched against the present case values.
+-Step 3A: If the matching case value is found, that case block is executed.
+-Step 3B: If the matching code is not found, then the default case block is executed if present.
+-Step 4A: If the break keyword is present in the block, then program control comes out of the switch statement.
+-Step 4B: If the break keyword is not present, then all the cases after the matching case are executed.
+-Step 5: Statements after the switch statement is executed.
+
+```
+## Example of switch
+```
+// C Program to create a simpe calculator using switch
+// statement
+#include <iostream>
+#include <stdlib.h>
+using namespace std;
+
+// driver code
+int main()
+{
+    // switch variable
+    char choice;
+    // operands
+    int x, y;
+
+    while (1) {
+        cout << "Enter the Operator (+,-,*,/)\nEnter x to "
+                "exit\n";
+        cin >> choice;
+
+        // for exit
+        if (choice == 'x') {
+            exit(0);
+        }
+
+        cout << "Enter the two numbers: ";
+        cin >> x >> y;
+
+        // switch case with operation for each operator
+        switch (choice) {
+        case '+':
+            cout << x << " + " << y << " = " << x + y
+                 << endl;
+            break;
+
+        case '-':
+            cout << x << " - " << y << " = " << x - y
+                 << endl;
+            break;
+
+        case '*':
+            cout << x << " * " << y << " = " << x * y
+                 << endl;
+            break;
+        case '/':
+            cout << x << " / " << y << " = " << x / y
+                 << endl;
+            break;
+        default:
+            printf("Invalid Operator Input\n");
+        }
+    }
+    return 0;
+}
+```
+## Output:
+
+```
+Enter the operator (+, -, *, /)
+
+Enter x to exit
+
++
+Enter the two numbers: 100 + 200
+100 + 200 = 300
+
+```