OCR Computer Science Paper 2

A variable is...

• A memory location used to store a value that can change.

• A memory location used to store a value that cannot change

A constant is...

• A memory location used to store a value that can change.

• A memory location used to store a value that cannot change

'Sequence' means...

• When lines of code only run if a condition is met. e.g. IF, ELIF, ELSE

• When lines of code loop e.g. WHILE, FOR

• When lines of code runs one line after the other

'Selection' means...

• When lines of code only run if a condition is met. e.g. IF, ELIF, ELSE

• When lines of code loop e.g. WHILE, FOR

• When lines of code runs one line after the other

'Iteration' means...

• When lines of code only run if a condition is met. e.g. IF, ELIF, ELSE

• When lines of code loop e.g. WHILE, FOR

• When lines of code runs one line after the other

A STRING is...

• A TRUE/FALSE or YES/NO value

• A word, or number not used in Maths.

• A whole number

• A number with a decimal point

An INTERGER is...

• A TRUE/FALSE or YES/NO value

• A word, or number not used in Maths.

• A whole number

• A number with a decimal point

A FLOAT is...

• A TRUE/FALSE or YES/NO value

• A word, or number not used in Maths.

• A whole number

• A number with a decimal point

A BOOLEAN value is...

• A TRUE/FALSE or YES/NO value

• A word, or number not used in Maths.

• A whole number

• A number with a decimal point

The data value '4.5' would be a...

• STRING

• INTERGER

• FLOAT

• BOOLEAN