The use of variables, constants, inputs, outputs and assignments

Question 1

What is a variable ?

Answer 1

• A value stored in memory that can change whilst the programmed is still running.

Question 2

What is a Constant?

Answer 2

• A value that does not change while the program is running and is assigned when the program is designed.
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Question 3

What is an assignment?

Answer 3

• -+Giving a variable or constant an variable.

Question 4

What is casting?

Answer 4

• Converting a variable from one data type to another.

- A variable can be an integer, character, string, real, float, Boolean. `

Question 5

What is an input?

Answer 5

• a value read from an input device.

Question 6

What is an output?

Answer 6

• Data generated by the computer and displayed by the user,

Question 7

What are the advantages of a constant?

Answer 7

• Makes programs easier to read- usually assigned and declared at the top of the program.
• Easily be changed by the programmer in one place of the programme.
• don’t change it every instance of a value throughout a program.
• Less chance of errors.
• Complier can optimise code.
• Makes program run faster.