Write Your First Program with the Rust Language

1
Install Rust
39s
2
Compile and run a Rust program from scratch
42s
3
Create a Rust package with the Cargo package manager
1m 7s
4
Compile and run a Rust program using Cargo
46s
5
Variables and Mutability in Rust
1m 48s
6
Output multiple variables using println!() in Rust
44s
7
Write and call a function in Rust
1m 10s
8
Understanding basic Ownership and Borrowing in Rust
2m 37s
9
Read user input from stdin in Rust
1m 13s
10
Handle errors with unwrap() in Rust
2m 56s
11
Handle errors in Rust using expect()
31s
12
Handle errors in Rust using Pattern Matching
2m 20s
13
Exit a program using std::process in Rust
46s
14
Create a loop in Rust
37s
15
Make your Rust code more DRY
1m 35s

Handle errors in Rust using expect()

InstructorPascal Precht

Rust>=1.40.0

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Published 5 years ago

Updated 4 years ago

This lesson discusses how to improve error handling by configuring custom error messages using the expect() function.

View code for this lesson

Instructor: [00:00] A slightly better way to unwrap a result type is to use the expect method as opposed to unwrap. Expect gives us the opportunity to pass a message to the user, such as "This is not a valid number," which is a bit more useful than what unwrap returns.

[00:20] If we now run the program and enter an invalid value, we'll see the error message shows up in this text trace.

Write Your First Program with the Rust Language

Handle errors in Rust using expect()

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