Master programming syntax, solve interactive challenges & run live code in Syntaxis Explore Arena →

menu_book Course Curriculum (Intro to Programming) expand_more

Core Concepts

Variables Numeric expressions Strings Booleans Conditional statements for loops while loops Functions

Data Structures

Lists Tuples Dictionaries Sets List slicing List comprehensions Nested data Sorting collections

Problem Solving

Input validation Exceptions Assertions Decomposition Pure functions Linear search Binary search Recursion

Practical Programs

Reading text files Writing JSON files Command-line arguments Simple class Unit test HTTP request concept Queue with deque CLI todo program

Intro to Programming / Problem Solving

Input validation

Learn Input validation in Intro to Programming with a focused explanation, a topic-specific example, and a mastery check.

12 min read • Intermediate

intro-programming-017.py

python

def parse_age(text):
 value=int(text)
 if not 0<=value<=130: raise ValueError('age out of range')
 return value
print(parse_age('29'))

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Input validation Mastery Check →

Sorting collections