Integer
Definition
An integer is a data type in programming that represents whole numbers without any decimal or fractional parts.
Analogy
Think of integers as the number of people waiting in line at a movie theater. You can count them using whole numbers, like 1, 2, 3, and so on. But you can't have half a person or a fraction of a person in the line.
Related terms
Math class: The Math class in programming provides various methods to perform mathematical operations on integers and other numeric data types.
Static methods: Static methods are functions that belong to a class rather than an instance of the class. They can be used to perform operations on integers without creating an object of the Integer class.
Floating-point: Floating-point is another data type that represents numbers with decimal or fractional parts. It is different from integers because it allows for more precision but also takes up more memory space.
"Integer" appears in:
Study guides (1)
Practice Questions (11)
What is the correct way to cast an integer to a double?
What is the result of the following code?<br>Integer x = new Integer(10);<br>int y = x;<br>System.out.println(y);
What is the result of the following code?<br>Integer x = new Integer(22);<br>int y = x.intValue();<br>System.out.println(y);
What is the result of the following code?<br>Integer x = new Integer(42);<br>int y = (int) x;<br>System.out.println(y);
What is the result of the following code?<br>int x = 5;<br>Integer y = x;<br>System.out.println(y);
What is the result of the following code?<br>String str = "123";<br>Integer x = Integer.parseInt(str);<br>System.out.println(x + 1);
What will be the result of the following code? ``` Integer num1 = new Integer(10); Integer num2 = new Integer(10); System.out.println(num1 == num2); ```
Which statement correctly creates an ArrayList called `arrayList` that stores Integers?
What will be the output of the following code? ``` ArrayList<Integer> list = new ArrayList<>(); list.add(5); list.add(7); list.add(9); list.add(11); list.add(13); System.out.println(list.size()); ```
What will be the output of the following code? ``` ArrayList<Integer> list = new ArrayList<>(); list.add(3); list.add(6); list.add(9); list.add(12); list.add(15); System.out.println(list.get(2)); ```
What is returned by the following code if the ArrayList passed in as the argument is [7, 10, 3, 5, 1]? public static int minimum(ArrayList<Integer> array) { int minValue = 0; for (int number: array) { if (number < minValue) { minValue = number; } } return minValue; }
Are you a college student?
Study guides for the entire semester
200k practice questions
Glossary of 50k key terms - memorize important vocab
Resources
© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.