Constants refer to fixed values that the program may not alter and they are called literals.
Constants can be of any of the basic data types and can be divided into Integer Numerals, Floating-Point Numerals, Characters, Strings and Boolean Values.
Again, constants are treated just like regular variables except that their values cannot be modified after their definition.
A scope is a region of the program and broadly speaking there are three places, where variables can be declared −
• Inside a function or a block which is called local variables,
• In the definition of function parameters which is called formal parameters.
• Outside of all functions which is called global variables.
We will learn what is a function and it's parameter in subsequent chapters. Here let us explain what are local and global variables.
تتضمن هذه المحاضرة التعريف بالمصارف الدولية . مفهومها واسباب التدويل المصرفي والاشكال التنضيمية لهذه المصارف والقروض التي تقدمها هذه المصارف
Esthetic dentistry has shown much advancement in materials and technology since the last century. Materials which have been used for esthetic restorations are silicate cement, glass ionomer, acrylic resins, composites and fused porcelain. R Bowen, in 1962 developed a polymeric dental restorative material reinforced with silica particles used as fillers. These materials were called ‘composites’. Nowadays, composite resins are considered as an economical and esthetic alternative to other direct and indirect restorative materials...........
Lecture Three / Logic Gates
1. Set of Gats AND, OR, NOT, XOR, NOR, NAND.
2. The Half-Adder Circuit.
3. The Full-Adder Circuit.
4. The Half-Subtractor Circuit.
Data types define the type of data a variable can hold, for example an integer variable can hold integer data, a character type variable can hold character data etc.
A variable is a name which is associated with a value that can be changed. For example when I write int num=20; here variable name is num which is associated with value 20, int is a data type that represents that this variable can hold integer values. We will cover the data types in the next tutorial. In this tutorial, we will discuss about variables.