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illustration of tracing a errorthe one way of following the flow of function or tracing it is to use the echo function the echo function that is a
logical errorsthe logical errors are more complicated to locate as they do not result in any error message the logical error is a mistake in
types of errorsthere are some various kinds of errors which can occur in a program that fall into the categories of run-time errors syntax errors and
debugging techniquesany error in the computer program is called a bug this word is thought to date back to the 1940s whenever a problem with an early
execution of persistent variablesthe functions can also be called from the script or from the command window as shown here for illustration the
persistent variablesgenerally whenever a function stops executing then the local variables from that function are cleared that means that each and
example of exponential function modular programin order to view the distinction in the approximate value for e as n increases the user kept choosing
example exit modular programin the illustration below the user chose the limit- whenever prompted for n entered the two invalid values
algorithm for appex subfunctionthe algorithm for appex subfunction is as shown receives x amp n as the input arguments initializes a variable
algorithm for expfn functionthe algorithm for expfn function is as shown receives the value of x as the input argument prints the value of
algorithm for subfunctionthe algorithm for subfunction askforn is as shown prompt the user for the positive integer n loop to print an error
algorithm for the function explainethe algorithm for the function explaine is as shown print a description of e the exp function and how to find
algorithm for the function ethe algorithm for the function eoption is as shownuse the menu function to show the 4 choiceserror-check an error would
examine exponential functionthe algorithm for the main script program is shown below call a function eoption to show the menu and return the users
write a program to examine exponential functionwe will write a program to examine the value of e and the exponential function it will be a
application menu driven modular programnumerous longer more involved programs which have interaction with the user are menu-driven that means that
help commandthe help command is used with the script rectarea the function readlenwid and the major function printrectarea to see the first comment
calcrectarea subfunctionfunction call area calcrectarealenwidfunction header function area calcrectarealen wid in the function call the two
printrectarea functionfunction call printrectarealength widthfunction header function printrectarealen wid in the function call there are two
readlenwid functionfunction call length width readlenwidfunction header function lw readlenwidin the function call not any argument is passed hence
illustration of subfunctionsthis is an illustration of running this programgtgt rectareaplease enter the length 6please enter the width 3for a
function callin the function call not any arguments are passed so there are no input arguments in the function header the function returns an output
executing a programrunning the program would be completed by typing the name of the script this would call the other functionsgtgt
execution stepswhenever the program is executed the steps below will take placethe script calcandprintarea starts executingthe calcandprintarea calls
modular programsin a modular program the answer is broken down into modules and each is executed as a function the script is usually known as the