Table of Contents📚
Code Blocks🟪
What is a code block❓
A code block is a piece of code between two {} that is kind of isolated from the rest of the code, but it can still access variables and functions from outside the code block.
Usage
For example, we can use a code block to define and print a variable:
let sock1 = "First sock 🧦";
{
let sock2 = "Second sock 🧦";
println!("I have the {} and the {}", sock1, sock2);
}
Output:
I have the First sock 🧦 and the Second sock 🧦
Everything is working as expected, but now, let’s try to print the values of sock1 and sock2 outside the code block:
let sock1 = "First sock 🧦";
{
let sock2 = "Second sock 🧦";
}
println!("I have the {} and the {}", sock1, sock2);
Output:
We get the following error because sock2 is not defined outside the code block
So the second sock disappears when the code block ends.