What is a regular expression for a set of strings of 0s and 1s with even number of 0s *?
All strings containing an even number of 0’s: 1*+ (1*01*0)*1*. The first expression 1* describes the strings with no 0’s. The expression (1*01*0)*1* describes the strings with at least two 0’s.
What is the correct regular expression for the language of words containing even number of A’s?
Even number of a’s : The regular expression for even number of a’s is (b|ab*ab*)*.
How do you write numbers in regular expressions?
The [0-9] expression is used to find any character between the brackets. The digits inside the brackets can be any numbers or span of numbers from 0 to 9. Tip: Use the [^0-9] expression to find any character that is NOT a digit.
Which of the pair of regular expressions that are equivalent?
Discussion Forum
| Que. | Find the pair of regular expressions that are equivalent |
|---|---|
| b. | (0+1)* and (0+1*)* |
| c. | (0+10)* and (0*+10)* |
| d. | All of the mentioned |
| Answer:All of the mentioned |
What is the regular expression used if you want to only allow for digits 1 through 9?
The regex [0-9] matches single-digit numbers 0 to 9. [1-9][0-9] matches double-digit numbers 10 to 99.
Where is regular expression used in programming?
It is used in every programming language like C++, Java and Python. What is a regular expression and what makes it so important? Regex are used in Google analytics in URL matching in supporting search and replace in most popular editors like Sublime, Notepad++, Brackets, Google Docs and Microsoft word.
How do you make a regular expression using the DFA?
Using the DFA here we can make a regular expression the following way, where A, B, C represent the states of the DFA. When you divide a number by three, there are only three possible remainders (0, 1 and 2). What you’re aiming at is to ensure the remainder is 0, hence a multiple of three. ST0, multiple of 3 (0, 3, 6, 9..).
How to write a regular expression for an email address?
Example : Regular expression for an email address : ^ ([a-zA-Z0-9_-.]+)@ ([a-zA-Z0-9_-.]+). ([a-zA-Z] {2,5})$ The above regular expression can be used for checking if a given set of characters is an email address or not. How to write regular expression? Repeaters : *, + and { } :
How to combine multiple symbols of a regular expression into one?
A set of different symbols of a regular expression can be grouped together to act as a single unit and behave as a block, for this, you need to wrap the regular expression in the parenthesis ( ). Example : ( [A-Z]\\w+) contains two different elements of the regular expression combined together.