What will be the output of the following Java code?class area {public static void main(String args[]) { double r, pi, a; r = 9.8; pi = 3.14; a = pi * r * r; System.out.println(a);} }

Quiz on integer, character, floating and boolean data types, variables, type casting and conversions and properties of arrays. Java has two types of data types: primitive data types and reference data types. Primitive data types are the basic data types that are built into the Java language. There are eight primitive data types in Java: byte: A byte is an 8-bit signed integer. short: A short is a 16-bit signed integer. int: An int is a 32-bit signed integer. long: A long is a 64-bit signed integer. float: A float is a 32-bit floating-point number. double: A double is a 64-bit... Show more

Quiz on integer, character, floating and boolean data types, variables, type casting and conversions and properties of arrays.

Java has two types of data types: primitive data types and reference data types.
Primitive data types are the basic data types that are built into the Java language. There are eight primitive data types in Java:
byte: A byte is an 8-bit signed integer.
short: A short is a 16-bit signed integer.
int: An int is a 32-bit signed integer.
long: A long is a 64-bit signed integer.
float: A float is a 32-bit floating-point number.
double: A double is a 64-bit floating-point number.
boolean: A boolean is a 1-bit value that can be either true or false.
char: A char is a 16-bit Unicode character.
Reference data types are data types that are created by the programmer. Reference data types include classes, interfaces, and arrays.

Java has four primitive data types for integers: byte, short, int, and long. Java also has two floating-point data types: float and double.

Variables are used to store data. A variable is declared by specifying its data type and its name. Once a variable is declared, it can be assigned a value. 

Arrays are data structures that can store a fixed number of values of the same data type. Arrays are declared by specifying the data type of the elements in the array and the number of elements in the array.
Once an array is declared, it can be accessed using its index. The index of an array element is an integer that specifies the position of the element in the array. The first element in an array has an index of 0, the second element has an index of 1, and so on.

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