Quantum Computing – The Next Tech Revolution Technology has evolved rapidly over the last few decades—from bulky mainframe computers to powerful smartphones in our pockets. Yet, despite these advances, traditional computers are approaching their physical limits. This is where quantum computing enters the scene, promising to revolutionize the way we process information and solve complex problems. What Is Quantum Computing? Quantum computing is a new paradigm of computing that uses the principles of quantum mechanics, a branch of physics that explains how matter and energy behave at the smallest scales. Unlike classical computers, which use bits that represent either 0 or 1, quantum computers use qubits. Qubits can exist in multiple states simultaneously, thanks to a property called superposition. Additionally, qubits can be interconnected through entanglement, allowing them to share information instantaneously. These unique properties give quantum computers immense computational power....
IDENTIFIERS AND KEYWORDS
Every word in a C program is either a keyword or an identifier.
Identifiers
Identifiers are normally names given to program elements such as variables,
arrays, and functions. They are grouped by using a sequence of letters (both uppercase and lowercase), numerals, and underscores.
Following are the rules for creating identifier names:
* Identifiers cannot adds any special characters or punctuation marks
(like #, $, ^, ?, ., etc.) except the underscore “_”.
* There cannot be two successive underscores.
* Keywords cannot be used as identifiers.
* The case of alphabetic characters that make the identifier name is significant. For example, ‘FIRST’ is different from ‘First’ and ‘first’.
* Identifiers must start with an underscope or a letter. However, use of underscore as the first character must be ignored because several complier-defined identifiers in the standard C library have underscore as their first character. So, inadvertently copied names may cause definition incampatibility .
* Identifiers can be of any reasonable length. They should not has more than 31 characters. (They can actually be longer than 31, but the compiler looks at only the first 31 characters of the name.)
Keywords
Like every computer language, C has a set of reserved words they are known as keywords that cannot be used as an identifier. All keywords are normally a series of characters that have a fixed meaning. By compact, all keywords must be written in lower case letters.
Keywords in C language
auto, break, case, char, const, continue, default, do, double, else, enum, extern, float, for, goto, if, int, long, register, return, short, signed, sizeof, static, struct, switch, typedef, union, unsigned, void, volatile, while