Day 1 of 100 Days of Code

Introduction

• Welcome to the 100 Days of Code challenge.
• Goal: Write and understand code from scratch.
• Future videos will include more complex programs.

Writing the First Program

• Example program: Printing "Hello World"
• Function: A piece of code designed to perform a specific task.
  • print: Function used to display output.
• Syntax for using functions in Python:
  1. Write the function name (e.g., print)
  2. Use parentheses () to call the function.
  3. Place contents to print inside the parentheses, enclosed in double quotes "" for strings.

Understanding Errors and Debugging

• Example error: Red line under code, indicating syntax error.
• Python requires valid objects within functions.
• Strings must be enclosed in double quotes.

Script Execution

• Manually typing and running each line is not efficient.
• Use scripts (e.g., main.py) to execute multiple lines sequentially.
• Example script with multiple print statements: print('Hello World') print(5) print('Bye')
• Scripts allow batch execution of code lines.

Interactive vs. Script Mode

• Interactive mode (REPL): Run and test code line by line manually.
  • REPL stands for Read-Evaluate-Print Loop.
• Script mode: Write a sequence of commands in a file and execute them together.

Computations in Print Statements

• Can perform arithmetic operations within print:
  • Addition (+)
  • Subtraction (-)
  • Multiplication (*)
  • Division (/)
• Example: print(17 * 13) print(221) # Direct number output
• Results of computations are printed directly.

Importance of Consistency and Practice

• This course requires daily, consistent practice.
• Not suitable for quick shortcuts or learning without practice.
• Success requires dedication and practice over the entire 100 days.

Conclusion

• Stay dedicated and keep practicing.
• Bookmark the playlist and follow along daily.

Thank you for watching and see you next time!