--- ###### tags: `C++` --- # Control ## If Single Selection ![](https://i.imgur.com/OqsRpfM.png) ### Usage ```C++= if (condition) { Starement... } ``` ## If Else Double Selection ![](https://i.imgur.com/E4IDu55.png) ```C++= if (condition) { Starement... } else { Starement... } ``` ## Condition Operation ![](https://i.imgur.com/umQ0lge.png) ### Eg 1 ```c++= int a=0 cout<<a=1 ? "Yes" : "No"; ``` > No ## Multiple Selection ### Else If ```c++= if (condition1) { Starement... } else if (condition2) { Starement... } else { Starement... } ``` #### In C++ it will be seen that... ```c++= if (condition1) { Starement... } else { if (condition2) { Starement... } else { Starement... } } ``` >However, we favor to use former ### Switch Case ```C++= switch(various) { case condition: Starement... break; case condition: Starement... break; default: Starement... break; } ``` > if we don't use break，it will not break out > Instead, it will keep doing those instruction