Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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mystr is "numberlike" if:

  - mystr is not the empty string

  - the first character in mystr is a digit

  - the count of '.' in mystr is zero or one (can't have more than one decimal point in a number)

  - every character in mystr is a digit ('0', '1', '2', ..., '9') or a decimal point ('.')

Write a simple python code in python to define the function is_numberlike(mystr), which takes a string parameter and returns a boolean result. 

If mystr is numberlike, the function returns True; otherwise, the function returns False.

Hint: Check the first three requirements with decision statements, then use a for loop to iterate over mystr and check the every character is a digit or a dot

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