Validate if a given string is numeric.
Some examples:
"0" => true
" 0.1 " => true
"abc" => false
"1 a" => false
"2e10" => true
Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.
Update (2015-02-10):
The signature of the C++ function had been updated. If you still see your function signature accepts a const char * argument, please click the reload button to reset your code definition.
class Solution:
     def isNumber(self, s):
         try:
             float(s)
             return True
         except:
             return False

class Solution:
     def isNumber(self, s):
         try:
             float(s)
             return True
         except:
             return False
