40 lines
1.2 KiB
Markdown
40 lines
1.2 KiB
Markdown
# What we did:
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Created a guessing game! This file takes in a number from the user, generates
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a random number, and compares the two to say whether the guess is correct,
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lower, or higher. It introduces us to key concepts in Rust such as module
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importing, the idea of mutability, how to define variables, and other
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interesting type things.
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## Breaking Down some things
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### Types, and variants
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When creating the variable `guess` we created it as
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```rust
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let mut guess = String::new();
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```
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where we call `String::new()`. `String` is a type, that has a function `new`
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integrated into that type.
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Then, we read in the data. Some interesting things happen here:
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1. We use `&mut guess` where `&` signifies a *reference* to an object
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2. We have an `.expect()`
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a. `.read_line` returns a string, but it also returns a result
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b. This result is an *enumeration* type, with each possible
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result being a *variant*.
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Wacky stuff.
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Next, we do some interesting things with strings. Printing strings uses
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curly brackets, kind of like python. These can hold the variable, or
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use an expression that is later in the print statement. Like this:
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```rust
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let x = 6;
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let guess = 3;
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println!("You guessed: {}, {x}", guess);
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>> You guessed 3, 6
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```
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