Step Through Codes during Debugging Process

• Right-click at the starting line of the code which you want to analyze
• Select "Run to cursor"
• Your program will be run. Enter some values to test the code
• In the lower-left side, choose 'Local' tab. Here, you can monitor the local variables assignment. 
• Debug -> Step into (shortcut: F11), to run the next code
• Do the last step for several time while monitoring the 'Local' tab, until you figure out how your code works.