ELI5: Explain Like I'm 5

Find first set

Okay kiddo, let's talk about finding the first set. Have you ever played with a set of blocks, and you wanted to find the first block that's colored red?

Finding the first set is sort of like that, but instead of colored blocks, we're looking at sets of values in a computer program.

When we talk about a set, we mean a collection of values. In computer programs, we often use sets to keep track of things like which items are in a shopping cart or which words are in a sentence.

Now, let's say we have a set of values and we want to find the first one in the set. We can do that by looking at each value in the set, one at a time, until we find the first one.

To make it easier, we can number the values in the set starting from 0. So the first value will be numbered 0, the second 1, and so on.

We can then use a loop in our computer program to go through each value in the set, starting at value 0, and check if it matches what we're looking for.

If we find the first value that matches what we're looking for, we can stop looking and return that value.

So, imagine we have a set of numbers: 5, 7, 1, 3, 9, 2. If we wanted to find the first even number in the set, we would start at the first value (5), check if it's even (it's not), then move to the second value (7), check if it's even (it's not), and so on.

When we reach value 2, we'll see that it's even, so we'll stop looking and return the value 2 as the first even number in the set.

And that's how we find the first set, just like finding the first red block in a set of blocks.