2.2-2.3 Flashcards by Jess Thorley

What is an integer

Whole number
Int

How well did you know this?

Not at all

Perfectly

What is a real/float

Numbers with decimals
real

How well did you know this?

Not at all

Perfectly

What is a Boolean

Can take one of two values(true/false)
bool

How well did you know this?

Not at all

Perfectly

What is a character

Single letter,number or symbol
char

How well did you know this?

Not at all

Perfectly

What is a string

Text
string

How well did you know this?

Not at all

Perfectly

What do strings and characters always need when coding

Speech marks

How well did you know this?

Not at all

Perfectly

Advantages of data types

Make code more memory efficient, robust and predictable

How well did you know this?

Not at all

Perfectly

What is casting and give an example of coding

Converting between data types
real(1) converts integer to real 1.0

How well did you know this?

Not at all

Perfectly

What do arithmetic operators do, what data types do they work on and give an example

Take two values and perform maths functions on them
Work on real or integer values
DIV and MOD

How well did you know this?

Not at all

Perfectly

What is DIV

Returns while number of the division

How well did you know this?

Not at all

Perfectly

What is MOD

Returns remainder of the division

How well did you know this?

Not at all

Perfectly

What do assignment operators do and give an example

Assign values to constants or variables

How well did you know this?

Not at all

Perfectly

What are comparison operators and give an example

Compare value from left to right side to produce a Boolean value(true/false)

How well did you know this?

Not at all

Perfectly

What is a constant

Assigned the data value at design time and can’t be changed while running

How well did you know this?

Not at all

Perfectly

What is a variable

Can change values

How well did you know this?

Not at all

Perfectly

What is concatenation

Joining two strings together to form a new string using the + operator

How well did you know this?

Not at all

Perfectly

Code to put all character to upper or lower case

X.upper
X.lower

How well did you know this?

Not at all

Perfectly

Code to get the number of characters in a string

X.length

How well did you know this?

Not at all

Perfectly

Code to extract the first I characters from a string or last I characters

X.left(I)
X.right(I)

Code to extract a string starting at a with length b

X.substring(a,b)

Code to get a random number

X = random(1,6)

What is a one dimensional array and give code

List
Family = [“jess”, “Alice”]

What is a two dimensional array

Table

How to open a file

File = open(“file.txt”)

How to close a file

File.close()

How to read a file line

File.readline()

How to write a line to a file

File.writeline(“hello”)

How to end a file

EndOfFile()

How to create a new file

NewFile(“myFile.txt)

What is a record

Stores à collection of data values with different data types

What is each item in a record called

A field

How to make a record with examples

1) create record Record recipes Int recipe number String recipe name End record 2)assign to variables Recipe1 = recipes(1,”chocolate cake”) 3)use variable name to access Print(recipe1) Print(recipe1.recipename)

What is a procedure

Set of instructions stored under one name and when you want to repeat you only have to call the name

What is a function

A set of instructions stored under one name and when you want to repeat you only have to call the name but they always return a value

Why are functions and procedures useful

Cut down on the amount of code written as only need to call it Results in less errors Easier to debug Easier to read code

What is a parameter

Special variables used to pass values into a sub program

What is an argument

Actual values that parameters take when sub values are called

Do procedures have parameters

Sometimes but not always

Procedure in code

Procedure welcome() Print(“hello”) End procedure

Does a function need a parameter

Yes at least one

Why is a function always assigned to a variable

Otherwise the value will be lost

Function code

Function joinstrings(x,y) Return x + “ “ + y End function Subject = joinstrings(“computer”,”science”) Print(subject)

What is a variable scope

Which parts of the program the variable can be used in

What is a local variable and the advantages

Used within the structure they’re declared in (sub program) Can’t affect anything outside and can use the same variable name again outside

What is a global variable and the advantages

A variable anytime after their declaration Used anywhere but value in large program is hard to keep track of