Programming Contrstucts

Question 1

Define a Variable

Answer 1

A named location in computer memory used to hold data when a program is running. The value of the variable can change while the program is running

Question 2

Define a Constant

Answer 2

A named location in computer memory used to hold data when a program is running. The value of the variable cant change while the program is running and remains constant

Question 3

Define a Boolean operator

Answer 3

An operator that allows conditions to be combined then evaluated , the outcome is a Boolean variable

Question 4

Define a Arithmetic Operator

Answer 4

Enables arithmetic operations to be carried out using variable

+,-,*

Question 5

Define an Input Statement

Answer 5

A statement used to capture data which is to be used in the program

Question 6

Define an Output Statement

Answer 6

A statement used to output data and information from the program

Question 7

Define an Assignment Statement

Answer 7

A statement that assigns a value to a variable, constant or other data structure

A= b+c

Question 8

What are the three program control structures

Answer 8

Sequence
Selection
Iteration

Question 9

Define Sequence

Answer 9

denotes the order in which the instructions are carried out by the computer

Question 10

Describe Selection

Answer 10

In selection a condition is used to decide which piece of code should be executed.

This is acheived through the use of IF statements and BOOLEAN operateors

Question 11

Describe Iteration

Answer 11

another word for reptation

Repetitions is used when a section of code is to be carried out more than once

This can be acheived throihh loops