Detect Floating Point Number in Python HackerRank Solution

Hello Programmers, In this post, you will know how to solve the Detect Floating Point Number in Python HackerRank Solution. This problem is a part of the HackerRank Python Programming Series.

One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

Detect Floating Point Number in Python HackerRank Solutions

Problem

re
A regular expression (or RegEx) specifies a set of strings that matches it.
A regex is a sequence of characters that defines a search pattern, mainly for the use of string pattern matching.
The re.search() expression scans through a string looking for the first location where the regex pattern produces a match.
It either returns a MatchObject instance or returns None if no position in the string matches the pattern.
Code :

>>> import re
>>> print bool(re.search(r"ly","similarly"))
True

The re.match() expression only matches at the beginning of the string.
It either returns a MatchObject instance or returns None if the string does not match the pattern.

Code :

>>> import re
>>> print bool(re.match(r"ly","similarly"))
False
>>> print bool(re.match(r"ly","ly should be in the beginning"))
True

You are given a string N.
Your task is to verify that N is a floating point number.
In this task, a valid float number must satisfy all of the following requirements:> Number can start with +, – or . symbol.
    For example:
    ✔+4.50
    ✔-1.0
    ✔.5
    ✔-.7
    ✔+.4
    ✖ -+4.5
> Number must contain at least  decimal value.
For example:
✖ 12.
✔12.0 
> Number must have exactly one . symbol.
> Number must not give any exceptions when converted using float(N).

Input Format :

The first line contains an integer T, the number of test cases.
The next T line(s) contains a string N.

Constraints :

• 0 < T < N

Output Format :

Output True or False for each test case.

Sample Input :

4
4.0O0
-1.00
+4.54
SomeRandomStuff

Sample Output :

False
True
True
False

Explanation :

40O0 :O is not a digit.
– 1.00: is valid.
+4.54: is valid.
SomeRandomStuff: is not a number.

Detect Floating Point Number in Python HackerRank Solutions

import re
class Main():
    def __init__(self):
        self.n = int(input())
        for i in range(self.n):
            self.s = input()
            print(bool(re.match(r'^[-+]?[0-9]*\.[0-9]+$', self.s)))
if __name__ == '__main__':
    obj = Main()

Disclaimer: The above Problem (Detect Floating Point Number in Python) is generated by Hackerrank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

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