Local & Global Variables

Local & Global Variables

by BSN Computing

Multiple Select

In this lesson I am going to learn to ... ?

• Define 'local variable'

• Define 'global variable'

• Justify use of both

• Define 'national variable'

Open Ended

Describe in your own words what this program does

Multiple Choice

What would happen if you tried to print the value of pOne on line 8?

• It would give a run-time error

• 9

• 13

• 4

Open Ended

Can you explain why it generates an error?

Fill in the Blank

Variables have different access rules depending on where they are assigned in the program. This is called variable _______.

Draw

Write the variable num1 from previous program in the correct scope

Draw

Write the variable pTwo from previous program in the correct scope

Fill in the Blank

Variables defined at the level of the main program are ______ in scope.

Fill in the Blank

Variables or parameters defined in subprograms are _____ in scope.

Multiple Choice

What feature of your IDE can be used to more easily see variable scope?

• Debugger

• Shell

• Syntax highlighting

• Auto-indentation

Draw

Circle a variable in the global scope ...

Draw

Circle a variable in the local scope ...

Multiple Choice

Local or Global?

Used inside subprograms

• Local

• Global

Multiple Choice

Local or Global?

Only used in main program

• Local

• Global

Multiple Choice

Local or Global?

Passed as an argument into a subprogram

• Local

• Global

Multiple Choice

Local or Global?

Preferred use of a variable

• Local

• Global

Fill in the Blank

Type the name of a variable in the global scope ...

Fill in the Blank

Type the name of a variable in the local scope ...

Fill in the Blank

Type the name of a subprogram parameter ...

Fill in the Blank

Type the line number of a procedure call ...

Fill in the Blank

Type the line number of a function call ...

Multiple Choice

Which range of line numbers is in the global scope?

• 1 - 4

• 6 - 11

• 13 - 20

• 22 - 35

Multiple Select

Which ranges of line numbers are in the local scope?

• 1 - 4

• 6 - 11

• 22 - 35

• 37 - 44

Multiple Select

In this lesson I have learned to ...

• Define 'local variable'

• Define 'global variable'

• Justify use of both

• Define 'national variable'

Open Ended

Thinking Hard

What would be the hardest question you could ask someone on this topic?

What would the answer be?

(press Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it