Validating user input with c

This document specifies a syntax created by subsetting an existing, widely used international text processing standard (Standard Generalized Markup Language, ISO 8886(E) as amended and corrected) for use on the World Wide Web.It is a product of the XML Core Working Group as part of the XML Activity. As a convenience to readers, it incorporates the changes dictated by the accumulated errata (available at to the Fourth Edition of XML 1.0, dated 16 August 2006.You might prefer to have these numbers output as, for example, 3.14159, 1050.00, and 43.58.Java has a "formatted output" capability that makes it easy to control how real numbers and other values are printed. I will cover just a few of the simplest and most commonly used possibilities here.

This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at

The function specifies the minimum number of spaces that should be used for the output.

If the integer that is being output takes up fewer than 12 spaces, extra blank spaces are added in front of the integer to bring the total up to 12.

See also Putting the Community back in Wiki, which says "Compiling a canonical reference" is "something wonderful".

Questions like this one are asked often enough to justify writing a post that can concisely answer all of them.while True: try: # Note: Python 2.x users should use raw_input, the equivalent of 3.x's input age = int(input("Please enter your age: ")) except Value Error: print("Sorry, I didn't understand that.") #better try again...

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