Trace Tables

What does a trace table do?

• They trace tables

• They allow programmers to trace the value of variables as each line of the code is executed.

• They allow programmers to trace the whole program at the same time.

• They allow computers to error check the program on their own

Look at the Algorithm Below. In the corresponding Trace Table, what value should 'A' be?

• 1

• 3

• 5

• 7

Look at the Algorithm Below. In the corresponding Trace Table, what value should 'C' be?

• 1

• 3

• 8

• 13

Look at the Algorithm Below. In the corresponding Trace Table, what value should 'D' be?

• 11

• 13

• 8

• 1

Look at the Algorithm Below. In the corresponding Trace Table, what value should 'F' be?

• 5

• 8

• 13

• 18

How would you create a trace table?

• Write output at the left column, test data and Boolean expression at the right column

• Draw a table using tracing paper

• Write the output at the right row and test data at the left row

• Write output at the right column, test data and Boolean expression in the left column

What is Step 1?

• Draw the trace table with each variable

• Stimulate the action the computer will take when it executes each statement

• Number each executable statement in your code

• Check the output produced matches the expected output

What is Step 2?

• Draw the trace table with each variable

• Stimulate the action the computer will take when it executes each statement

• Number each executable statement in your code

• Check the output produced matches the expected output

What is Step 3?

• Draw the trace table with each variable

• Stimulate the action the computer will take when it executes each statement

• Number each executable statement in your code

• Check the output produced matches the expected output

What is Step 4?

• Draw the trace table with each variable

• Stimulate the action the computer will take when it executes each statement

• Number each executable statement in your code

• Check the output produced matches the expected output