input keyword

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Which is the correct VCAA pseudocode statement to accept a value from the user?

A age <- input

B input age

2. Can the input keyword accept more than one variable at a time?

A No — input only works with one variable

B Yes — input a, b accepts two values at once

3. Where in a VCAA pseudocode algorithm should input statements appear?

A After the Algorithm header, before processing

B After the processing statements

4. Which of these correctly accepts two numbers from the user in VCAA pseudocode?

A input x, y

B INPUT X, Y

5. Which correctly uses input in a complete VCAA algorithm?

A Algorithm: add input a, b total <- a + b

B Algorithm: add total <- a + b input a, b

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1input age		AWrong — you cannot use <- with input. The correct form is `input score` with the keyword first and the variable name after it
2input a, b		BAlgorithm: compute area input length, width area <- length * width print area
3The input keyword must appear before any processing that uses the input variables		CAccepts two values from the user in one statement, storing the first in a and the second in b
4input accepts values from the user and stores them in named variables without needing the <- operator		Dinput score if score > 50 then print "Pass" end if
5score <- input		EWrong — VCAA pseudocode keywords are written in lowercase. The correct form is `input name` not `INPUT name`
6INPUT name		FAccepts a single value from the user and stores it in the variable named age

Definitions

input

Fill in the Blanks

Complete each line of code by filling in the missing parts.

_____ age

input ______, height

Algorithm: find average _____ a, b average <- (a + b) / 2

Algorithm: check score input _____ if score > 50 then

Algorithm: sum three _____ x, y, z total <- x + y + z

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A Algorithm: greet user

B enter name

C print name

Question 2

A Algorithm: add numbers

B input a, b

C input total <- a + b

D print total

Question 3

A total <- a + b

B input a, b

C print total

Question 4

A Algorithm: compute product

B input x, y

C result <- x * y

D print results

Question 5

A Algorithm: temperature check

B INPUT temp

C if temp > 100 then

D print "Too hot"

E end if

Answer Key

input keyword

Section A: Quick Questions

B — input age

B — Yes — input a, b accepts two values at once

A — After the Algorithm header, before processing

A — input x, y

A — Algorithm: add input a, b total <- a + b

Section B: Match the Pairs

input age → Accepts a single value from the user and stores it in the variable named age

input a, b → Accepts two values from the user in one statement, storing the first in a and the second in b

The input keyword must appear before any processing that uses the input variables → Algorithm: compute area input length, width area <- length * width print area

input accepts values from the user and stores them in named variables without needing the <- operator → input score if score > 50 then print "Pass" end if

score <- input → Wrong — you cannot use <- with input. The correct form is `input score` with the keyword first and the variable name after it

INPUT name → Wrong — VCAA pseudocode keywords are written in lowercase. The correct form is `input name` not `INPUT name`

Section C: Definitions

input — A VCAA pseudocode keyword that accepts a value from the user and stores it in a named variable. Example: input age stores the user's entered value in the variable age

Section D: Fill in the Blanks

input age

input length, height

Algorithm: find average
input a, b
average <- (a + b) / 2

Algorithm: check score
input score
if score > 50 then

Algorithm: sum three
input x, y, z
total <- x + y + z

Section E: Spot the Error

B — `enter name` is not valid VCAA pseudocode. The correct keyword for accepting user input is `input`. The line should read `input name`. Line 1 is wrong.

C — `input total <- a + b` incorrectly mixes the input keyword with an assignment. `input` only accepts user values — calculation and assignment use <-. The correct statement is `total <- a + b` on its own line. Line 2 is wrong.

A — `total <- a + b` appears before `input a, b`, but a and b have not yet been given values. Input must come before any processing that uses those variables. Line 0 is wrong.

D — `print results` references a variable called `results` but the variable was assigned as `result` on line 2. Variable names must match exactly — `result` and `results` are different identifiers. Line 3 is wrong.

B — VCAA pseudocode keywords are written in lowercase. `INPUT` in all capitals is incorrect — the correct form is `input temp` in lowercase. Line 1 is wrong.