Create Conditional_operator.md

src/pages/cplusplus/Conditional_operator.md

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+---
+title: Conditional Operator
+---
+
+## Conditional Operator
+
+Conditional operator is a ternary operator, that is it needs 3 operands. 
+Conditional operator is used to replace a simple if-else statements.
+
+Syntax :
+```cpp
+  (condition)?(expression-1):(expression-2);
+```
+Here, expression-1 is evaluated when condition is true and expression-2 is evaluated when condtion is false.
+Similar if-else statement would be :
+```cpp
+if(condition)
+  {
+    expression-1;
+  }
+else
+  {
+    expression-2;
+  }
+```
+Hence conditional operator is very handy when you need to write simple if-else statement. It can also be used in #define 
+preprocessor when similar condition is to be used in multiple places.
+
+For example, to find maximum of two number conditional operator can be used as follows :
+
+```cpp
+#define big(a,b) (a>=b)?a:b
+
+int maximum,x=5,y=6; // variable to store maximum of two numbers
+maximum=(x>y)?x:y; // directly using conditional operator
+maximum=big(x,y); // using the #define preprocessor defined above as big
+```
+ **Good Luck to all of you** 
+
+ **Happy Coding ! :)**
+
+ **Feel free to ask any queries on FreeCodeCamp's GitHub page or [FreeCodeCamp's Forum .](https://forum.freecodecamp.org/)**