What is Regular Expression? Properties of regular expression
Regular Expression : The language accepts by finite automata are easily described by simple expression called regular expression.
Regular expression operators are union , concatenation & closure/star.
Properties o… Read MoreWhat is String(Word)?
String(Word) : A string (word) is a finite sequence of symbols of that string .
Example : abc, 01110 are the examples of string
If You want to learn about the technology, computer science & engineering, web programmi… Read MoreWhat is Lexema?
Lexema : A lexema is a sequence of characters in the source program that is matched by the pattern for a token.
Example : For Pascal statement -
Cons pi = 3.1416;
Here, the sub-string pi is a lexema for the… Read MoreWhat is Token?
Token : The string representing a program can be partitioned at the lowest level into a sequence of sub-string called tokens. Each token is a sequence of characters whose significant is possessed collectively rather than in… Read MoreWhat is Symbol?
Symbol : A symbol is an abstract entity set we shall not define formally; just an point & line are not defined in geometry.
Example : Letter & digits are examples of symbol.
If You want to learn about the t… Read More
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