Chickenpox (Chicken Pox) , also known as Varicella, is a very contagious infection caused by the varicella zoster virus. In several parts of the world it is just known as varicella. Patients develop a blister-like rash, which first appears on the face and trunk, and then spreads throughout the body.
Modular arithmetic. Time-keeping on a clock gives an example of modular arithmetic. Modular arithmetic, sometimes also called clock arithmetic, is a way of doing arithmetic with integers. Much like hours on a clock, which repeat every twelve hours, once the numbers reach a certain value, called the modulus, they go back to zero. People talked about modular arithmetic in many ancient cultures.
While historically usage of these terms has been inconsistent, today modular programming refers to high-level decomposition of the code of an entire program into pieces: structured programming to the low-level code use of structured control flow, and object-oriented programming to the data use of objects, a kind of data structure.