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A snapshot of the summary - Introductory Programming
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Week 0
This is a preview. There are 44 more flashcards available for chapter 02/10/2017
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Is it legal to declare multiple variables of the same type on one line? If so, how?Yes -
, , ..., ; -
What is an assignment statement?A Java statement that stores a value into a variable's memory location
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Why will int x = 2.5; raise an error?Because x is declared an int variable = it can only store an int value (not a float)
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Can an int value be stored in a variable of a different data type?Yes - an int value can be stored in a variable of type double; a float variable can also accept an int
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Java has primitive data types and non primitive data types. What are the non primitive data types called? How many are there?Types that are not primitive are called object/reference types
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- strings
- arrays
- user defines classes -
How many bits does a short data type contain?16 bits
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How many bits does a float data type contain?32 bits
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What are the benefits of constraining the size of a variable?Optimising memory
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What is the syntax to declare/initialise multiple variables at once?
<type> <name> = <value> , <name> = <value> ;
-> note, you only need to declare the type once -
Which package do we import the Scanner from?
import java.util.*;
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