Detect Floating Point Number Hacker Rank Solution – Queslers

Problem : Detect Floating Point Number Hacker Rank Solution

Tutorial :

A regular expression (or RegEx) specifies a set of strings that matches it.
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 Hacker Rank Solution in python 2

# Enter your code here. Read input from STDIN. Print output to STDOUT

import re

for k in range(int(raw_input())):
    print bool(re.match(r"^[+-]?([0-9]+)?.[0-9]+$",raw_input()))

Detect Floating Point Number Hacker Rank Solution in python 3

# Enter your code here. Read input from STDIN. Print output to STDOUT
import re
for _ in range(int(input())):
    print(re.search(r'^([-\+])?\d*\.\d+$', input()) is not None)

Detect Floating Point Number Hacker Rank Solution in pypy

# Enter your code here. Read input from STDIN. Print output to STDOUT
import re 

for _ in xrange(int(raw_input())):
    print bool(re.search(r"^[+-]?[0-9]*\.[0-9]+$", raw_input().strip()))

Detect Floating Point Number Hacker Rank Solution in pypy 3

# Enter your code here. Read input from STDIN. Print output to STDOUT
import re
n= int(input())
numbers = []
for i in range(n):
    i = input()
    numbers.append(i)
#print(len(numbers))
for i in numbers:
    print(bool(re.search(r'^[-+]?[0-9]*\.[0-9]+$',i)))
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