Unit 2 Lab 2: Script Variables

MF: I guess, overall, I'm missing a sense of where I'm going and why I'm doing this as a reader. I feel like I'm just reading "you'll use this later" content and doing lots of little tasks.
MF: Our students might not be familiar with factorials and may not be solid enough with algebra to be confident with the presentation of 2a.
GitHub Feedback: It would be helpful in yellow text to know how to export the "between block" we created in U2L2 Mathematical tools. Currently I am just going to recreate it in U2L3 because I am just getting a bunch of text when I tried to "export block". Thanks.
More GitHub Feedback: Two different problems (#2 and #4) ask the student to build a >= block.
Even more GH feedback: #2 and # 4 are instructing us to do the same thing?
Operators like yellow text vertical and Operators like beige text state the same message? repetition is nice but one is walking on top of the other?

Building a Useful Collection of Predicates

Some tests—for example, a test to see if a number is even or if a letter is a vowel—are needed so often that you won't want to re-create them each time you need them. In this activity, you will create a set of tools that you may use often, especially for complicated programming tasks.

You've already built a predicate vowel? to test for vowels and a predicate to test for even numbers. snap has a built-in test to see if something is a number, but not a test to see if the number is an integer, and often you will want that.

snap has a "greater than" operator (>), an "equal" operator (=), and a "less than" operator (<) built in, but doesn't have a "greater than or equal to" (>=) operator.

Build and test it well to make sure it does what you expect.
- When you type the block's title in the Make a block dialog, choose the hexagonal predicate block shape.
- To set the block's name >= between the two input slots, use the left plus sign in the Block Editor.
- You may find one or more of these Boolean operators helpful:
There are several correct ways to do this! As long as your block gives the right true and false answers, it's correct.

Operators like a times b

that stand in between their two inputs are called infix operators. Operators like sqrt of

that stand before their inputs are called prefix operators. When we write n! to mean "n factorial," the "!" is a postfix operator—it comes after its input

In snap, it is possible to mix the types, as you will do in the next problem.

Build a predicate that tests to see if its input is an integer.
You may find useful.
Build a block that tells whether a given number is between two other given numbers. . You can decide whether "between," for your purposes, will include the two boundary numbers or not.
Write a block that reports whether a given day is a weekend. Let's assume that only Saturday and Sunday are part of the weekend.
Write a block. You could write this without your block, but it'll be much easier (and cleaner code!) if you use as part of this new block.