The use of data types and casting

Question 1

What does each data type use?

Answer 1

• different amount of memory.
• ## To optimise program the correct data type should be used.

Question 2

What is a integer?

Answer 2

• Whole number.
• Positive or Negative.
• Use for data that requires calculations.

Question 3

What is a real (float)?

Answer 3

• Number with a decimal part.

- Use for data that requires calculations.

Question 4

What is a character?

Answer 4

• Single Alphanumeric character.

Question 5

What is string?

Answer 5

• Set of characters.

- not used for calculations.

Question 6

What is Boolean?

Answer 6

• True or False.

- Track if something has happened or not.

Question 7

What is casting?

Answer 7

• Converting an variable from one data type to another.

Question 8

What are the advantages of casting?

Answer 8

• Sub-Problems receive data in format expected.
• Allows numbers to be manipulated into strings
• ## Inputs that are always strings to become numbers.