2023-09-30

Table of Contents

• Lecture 07: Conditional Statements (part II)
  • Lecture topics
  • Course materials
  • Topics to explore
    • Read
    • Exercise

Lecture 07: Conditional Statements (part II)

Lecture topics

• Different conditional structures
  • Practice
    • Even vs. odd number
    • Check if the input number is divisible by number 2
    • Check if the input number is divisible by number 4
    • Check if the input number is divisible by either 2 and 4
    • Check if the input number is divisible by either 2 or 4
    • Celcius to Farenheit conversion and temperature reminder
    • Draw different shapes based on input requests
• Indentation in Python
  • The Python language design is distinguished by its emphasis on readability, simplicity, and explicitness. Some people go so far as to liken it to "executable pseudocode"
  • Python uses whitespace (tabs or spaces) to structure code instead of using braces as in many other languages like R, C++, Java, and Perl. Consider a for loop from a sorting algorithm, such as:

    if x >= 5:
        print(f"x is greater or equal to 5")
    else:
        print(f"x is smaller than 5")

  • In C++, the same code could be like

    if (x >= 5) {
        std::cout << "x is greater or equal to 5" << std::endl;
    } else {
        std::cout << "x is smaller than 5" << std::endl;
    }      

  • A colon denotes the start of an indented code block after which all of the code must be indented by the same amount until the end of the block
  • Indentation here means - X consecutive spaces
    • There is no restrictions on the amount of spaces to use as long as you always stick to the same amount. However, 4 consecutive spaces is the general standard people follow
    • Many text editors have a setting that will replace tab stops with spaces automatically
  • Semicolons can be used, however, to separate multiple statements on a single line:

    a = 5; b = 6; c = 7

    • Putting multiple statements on one line is generally discouraged in Python as it can make code less readable.

Course materials

• slides

Topics to explore

Read

• TBD

Exercise

• TBD