Variables In Programming Language

A variable is a symbolic name for a memory location in which data can be stored and subsequently recalled. Variables are used for holding data values so that they can be utilized in various computations in a program. All

variables have two important attributes:

· A type which is established when the variable is defined (e.g., integer, real, character). Once defined, the type of a C++ variable cannot be changed.

· A value which can be changed by assigning a new value to the variable. The kind of values a variable can assume depends on its type. For example, an integer variable can only take integer values (e.g., 2, 100, -12).

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Object-Oriented Programming and JAVA Programming Language

Object-Oriented Programming and: Object-oriented programming (OOP) is a programming paradigm using "objects" – data structures consisting of data fields and methods together with their interactions – to design applications and computer programs. Programming techniques may include features such as data abstraction, encapsulation, messaging, modularity, olymorphism, and inheritance. Many modern programming languages now support OOP, at least as an option. JAVA Programming Language: Object-oriented programming is at the core of Java. In fact, all Java programs are object-oriented, this isn’t an option the way that it is in C++, for example. OOP is so integral to Java that you must understand its basic principles before you can write even simple Java programs. Therefore, this chapter begins with a discussion of the theoretical aspects of OOP.

Read or input form user in Java using BufferedReader

BufferedReader use to read text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.The buffer size may be specified, or the default size may be used. The default is large enough for most purposes. In Java BufferedReader is a efficient method to read an input. Here given a short example to read a string from user and print it: package palindrome; import java.io.BufferedReader; import java.io.InputStreamReader; public class inputExample { public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String s = new String(); s =br.readLine(); System.out.println(s); } }

Absolute value and Floating-point absolute value function in C Programming Language

Absolute value function in C Programming Language is abs(i), Its return the absolute valu of i. where i is any positive or negative number. It is integer type function. The include file of abs(i) is stslib.h Observe under program: #include<stdio.h> #include<stdlib.h> int main(void) { int a; scanf("%d",&a); printf("%d",abs(a)); } Here I use a integer number. Input it by scanf and print the Absolute value by abs() function. Floating-point Absolute value function in C Programming Language is fabs(i), Its return the absolute valu of i. where i is any positive or negative Floating-point number. It is double integer type function. The include file of fabs(i) is math.h Observe under program: #include<stdio.h> #include<stdlib.h> int main(void) { float a; scanf("%f",&a); printf("%.2f",fabs(a)); } Here I use a integer number. Input it by scanf and print the Floating-point Absolute value b

Programming, Data Structures & Algorithms

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