Learn Python in 21 Days vs PhD Challenge

Note: Screenshots may not reflect the final version of the app. Get Excited! Here is what you learn (subject to modification): - Introduction: Learn variables, indentation, and comments. - Data Types: Explore int, float, str, bool, list, tuple, set, dict. - Numbers: Work with integers, floats, and arithmetic operations. - Conditions: if, else, elif, boolean values, comparison, and logical operators. - Strings: String manipulation, concatenation, indexing, and slicing. - Lists and Tuples: Learn list operations, immutability in tuples, and common methods. - Loops: Use for loops, while loops, and the range() function. - Sets: Understand set properties and perform union, intersection, and difference. - Dictionaries: Work with key-value pairs and common dictionary methods. - Functions: Define functions, use arguments, return values, and lambda functions. - Modules: Import libraries like math and random. - Error Handling: Handle exceptions using try, except, and finally. - Class Basics: Learn basic object-oriented programming, classes, and objects.

PhD Challenge is a quiz game that takes you from elementary school all the way to a PhD. · 18 academic levels — Elementary, Middle School, High School, Undergraduate, Master's, and PhD — unlocked one by one · 6 graduation diplomas — 6th grade, 9th grade, 12th grade, senior year, Master's, and PhD. Pass each graduation exam to add the diploma to your Certificate Wall · Ability profile — see how you score across logical reasoning, data analysis, natural science, general knowledge and more, with an instant post-exam ability chart · Real exam conditions — each question has its own countdown (45–90 seconds); answers lock on submit and show an explanation, you can't go back, and the timer keeps running in the background · Fair retake system — 5 free attempts per level; once they're used, complete 8 hours of self-study to earn one free retake · Retake tickets — don't want to wait? Buy retake tickets for an instant retry, or get unlimited retakes forever · Stratified random questions — every exam draws a different mix, so memorizing answers won't get you through · Five languages: Simplified Chinese, Traditional Chinese, English, Japanese, and Korean · Fully playable offline; your progress is saved automatically on your device Are you really at an elementary level — or can you go all the way to a PhD? Start your academic journey now.