Understanding Procedures

What is a procedure?

• A method for completing something with steps and instructions for each aspect of the task!

• A variable that stores numerical data for calculations!

• A random sequence of instructions that a computer follows without any logic!

• A collection of data that is stored in a list or an array!

Defining a procedure is...

• Debugging code we've written.

• Setting up your procedure and telling it what instructions to follow.

• Telling your program to run the procedure and carry out the instructions.

Calling a procedure is...

• Inserting parameters into the parentheses of a procedure.

• Telling your program to run the procedure and carry out the instructions.

• Setting up your procedure and telling it what instructions to follow.

• Replacing repetitive blocks of code under a procedure.

Parameters are _______ that are created when you define a procedure.

Arguments are _______ that are put into the parameters when you call a procedure.

In the following procedure, the parameter str is a string and the parameter num is a number.

PROCEDURE printArgs(str, num)

{

DISPLAY(num)

DISPLAY(str)

DISPLAY(num)

}

Consider the following code segment.

printArgs("**", 1)

printArgs("*", 2)

What is displayed as a result of executing the code segment?

• 1 * 1 2 ** 2

• 1 ** 1 2 * 2

• * 1 * ** 2 **

• ** 1 ** * 2 *

Consider the following procedures.

PROCEDURE proc1(str)

{

DISPLAY(str)

DISPLAY("happy")

}

PROCEDURE proc2(str1, str2)

{

proc1(str2)

DISPLAY(str1)

}

What is displayed as a result of the procedure call proc2("birthday", "to you") ?

• birthday happy to you

• birthday happy birthday

• to you birthday happy

• to you happy birthday

Consider the following procedure.

PROCEDURE doSomething(num1, num2)

{

DISPLAY(num1)

RETURN(num1)

DISPLAY(num2)

}

Consider the following statement.

DISPLAY(doSomething(10, 20))

What is displayed as a result of executing the statement above?

• 10 10

• 10 20

• 10 10 20

• 10 20 10

Which of the following statements about parameters and arguments is true?

• Parameters are the actual values passed to a function, while arguments are the variables defined in the function.

• Parameters are the variables defined in the function, while arguments are the actual values passed to the function.

• Parameters and arguments are the same and can be used interchangeably.

• Parameters are only used in mathematical functions, while arguments are used in programming functions.

What is the primary purpose of using parameters in a procedure?

• To store temporary data within the procedure.

• To allow the procedure to accept input values and perform operations based on them.

• To define the output format of the procedure.

• To ensure the procedure runs faster.