Extract Number From String
January 18, 2019
We have another string-handling exercise today:
Given a string containing a number, extract the number from the string. For instance, the strings “-123”, “-123junk”, “junk-123”, “junk-123junk” and “junk-123junk456” should all evaluate to the number -123.
Your task is to write a program to extract a number from a string. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.
Programming Praxis 