Week 1 Conditionals - CS50's Introduction to Programming with Python

Lecture 1

• Conditionals
• if Statements
• Control Flow, elif, and else
• or
• and
• Modulo
• Creating Our Own Parity Function
• Pythonic
• match
  • Summing Up

Conditionals

• Conditionals allow you, the programmer, to allow your program to make decisions: As if your program has the choice between taking the left-hand road or the right-hand road based upon certain conditions.
• Built within Python are a set of “operators” that can are used to ask mathematical questions.
• > and < symbols are probably quite familiar to you.
• >= denotes “greater than or equal to.”
• <= denotes “less than or equal to.”
• == denotes “equals, though do notice the double equal sign! A single equal sign would assign a value. Double equal signs are used to compare variables.
• != denotes “not equal to.
• Conditional statements compare a left-hand term to a right-hand term.