Math Class Methods and Object Creation

Study Notes

Math Class Methods

abs(): Returns the absolute value of a number, always positive.
cbrt(): Returns the cube root of a number.
ceil(): Rounds a number up to the nearest integer.
copySign(): Returns the value of the first number with the sign of the second number.
max(): Returns the larger of two numbers.
min(): Returns the smaller of two numbers.
multiplyExact(): Multiplies two integers without overflow.
pow(): Raises a number to the power of another number.
random(): Generates a random number between 0 (inclusive) and 1 (exclusive).
rint(): Rounds a number to the nearest integer, similar to round().
sqrt(): Returns the square root of a number.

Object and Class Creation

Class Definition: A class is a blueprint for creating objects.
Object Instantiation: First ghj = new First(); creates an object named ghj based on the First class.
Accessing Object Members: Use the object name followed by a dot (.) to access variables and methods within the object, e.g., ghj.a.

Data Types

int: Stores whole numbers.
double: Stores decimal numbers.
char: Stores single characters using single quotes (' ') e.g., char d = 'u';
String: Stores sequences of characters.
Scanner: Used for getting user input.

Scanner Methods

model.nextLine(): Reads an entire line as a String.
model.nextInt(): Reads an integer from the input.
model.nextDouble(): Reads a double from the input.
model.next().charAt(0): Reads the first character of the next input.
model.next(): Reads the next token (word) from the input stream.

Description

This quiz covers essential mathematical methods used in programming, including operations like absolute values and square roots. Additionally, it delves into the fundamentals of class and object creation in programming. Test your understanding of these key concepts.