CS50x 2026 - Lecture 2 - Arrays

1 fish, 2 fish, red fish, blue fish. Congratulations. Today is your day. You're off to great places, you're off and away. It was a bright cold day in April, and the clocks were striking 13. Winston Smith, his chin nuzzled into his breast in an effort to escape the vile wind, slipped quickly through the glass doors of victory mansions,

though not quickly enough to prevent a swirl of gritty dust from entering along with him. Alright, this is CS 150, and this is week 2, and if we could after this dramatic reading, a round of applause for our volunteers. So we can now take for granted from week 1 that we now have a new way to express some

of the ideas that we first explored in week 0 like functions and conditionals and variables and the like, and now we're doing in see what we used to do in Scratch. Today what we're going to start to focus on is some real world problems so that we can take for granted that we have that expressiveness.

We have some tools in our toolkit and actually start to solve some real world problems. Problems if representative thereof. In particular, the real world problem that we're going to start today and this week with is that of reading levels. Odds are when growing up you read at a certain level based on the age at which you were at.

Maybe it was 1st grade level or 5th grade level or 10th grade level or the like, and that was a function of just how comfortable you were with the words in the book or words on the screen that you were reading. What you've just. Thanks to our volunteers are 3 different reading levels that each of these 3 volunteers reads at.

And in fact, why don't we go ahead and hear them again and be a little more thoughtful this time as to assess at what reading level your classmate is reading. So let's start with Leah if you'd like to introduce yourself first. Hi, I'm Leah. I'm a 1st year in Holworthy, and here's my little thing.