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Press any key to close the console window and exit Debug mode.

One of the great things in Visual Studio Code is debugging support.

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Install Node.js and create a simple Hello World JavaScript application ( app.js ).

Once youve written and compiled your application, you can begin testing it.

Visual Studio includes a comprehensive set of debugging tools that you can use when testing and troubleshooting your application.

Debugging in Debug mode Debug and Release are two of Visual Studios default build configurations.

The following toolbar image shows that Visual Studio is configured to compile your application in Debug mode.

You should always begin by testing your program in Debug mode.

Setting a breakpoint Run your program in Debug mode and try a few debugging features.

On the context menu, select Conditions to open the Breakpoint Settings dialog.

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You can also specify a hit count, which interrupts program execution before a statement is executed a specified number of times, or a filter condition, which interrupts program execution based on such attributes as a thread identifier, process name, or thread name.

In the console window, press the Enter key when prompted to enter your name.

Because the condition we specified, name is either null or, has been satisfied, program execution stops when it reaches the breakpoint and before the Console.WriteLine method executes.

Confirm the value is an empty string by entering the following statement in the Immediate Window.

The result is true.

Name String.Empty Select the Continue button on the toolbar to continue program execution.

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Clear the breakpoint by clicking on the dot in the left margin of the code window or by choosing the Debug Toggle Breakpoint menu item with the row selected.

For the Conditional Expression replace e.g.

X 5 with the following: String.IsNullOrEmpty(name) Youre testing for a code condition, that the String.IsNullOrEmpty(name) method call is True either because name has not been assigned a value or because its value is an empty string ().

Select the Locals window, which shows the values of variables that are local to the currently executing method, which is the Main method in your program.

String.IsNullOrEmpty(name) Select the Continue button on the toolbar to continue program execution.

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