Detect Floating Point Number in Python - HackerRank Solution
Problem :
Tutorial :
reA 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
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
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
For example:
✔+4.50
✔-1.0
✔.5
✔-.7
✔+.4
✖ -+4.5
> Number must contain at least
decimal value.
For example:
12.0
For example:
12. 12.0
> Number must have exactly one . symbol.
> Number must not give any exceptions when converted using float(N).
> Number must not give any exceptions when converted using float(N).
Input Format :
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.
- 1.00: is valid.
+4.54: is valid.
SomeRandomStuff: is not a number.
Solution :
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | # Detect Floating Point Number in Python - Hacker Rank Solution # Python 3 # Enter your code here. Read input from STDIN. Print output to STDOUT # Detect Floating Point Number in Python - Hacker Rank Solution START 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() # Detect Floating Point Number in Python - Hacker Rank Solution END |
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