F10 and F11 are used during Debugging the Project .
It is also called as Step Over. When we press F10 during debugging it will execute the function without going into the code of function.
It is called as Step Into. When we press F11 it will execute the function and also goes to the each line of code inside the function.
Start with Breakpoints:
A breakpoint is like a note to .NET to stop your programme at a particular place.Run your programme, and click the button. You are immediately returned to the coding window.
To continue checking your code, press F10 on your keyboard .
you can also press F11, but this will jump into any Subs you have set up.
The next line in your code will be highlighted.
Press the F10 key again. Then hold you mouse on the letter variable. The value of this variable will be displayed.
you can halt your program by clicking "Debug > Stop Debugging", or click the Stop icon on the toolbar.
Microsoft Certified Technology Specialist