If expression in Rust - Mini Project: Build & Apply

Using If Expression in Rust

📖 Scenario: Imagine you are building a simple program that decides if a person is old enough to vote. Voting age is 18 years or older.

🎯 Goal: You will create a program that uses an if expression to check a person's age and print whether they can vote or not.

📋 What You'll Learn

Create a variable called age with the value 20

Create a variable called voting_eligibility that uses an if expression to check if age is 18 or more

Use if expression to assign "Can vote" if age is 18 or more, otherwise "Cannot vote"

Print the value of voting_eligibility

💡 Why This Matters

🌍 Real World

Checking conditions like age eligibility is common in many programs, such as voting systems, age-restricted content, or membership access.

💼 Career

Understanding if expressions is fundamental for decision-making in programming, useful in almost every software development job.

1

Create the age variable

Create a variable called age and set it to 20.

Rust

# Create a variable called age and set it to 20
# Your code here

Need a hint?

Use let to create a variable and assign the number 20 to age.

2

Create the voting eligibility variable using if expression

Create a variable called voting_eligibility that uses an if expression to check if age is 18 or more. Assign "Can vote" if true, otherwise "Cannot vote".

Rust

let age = 20;
# Create voting_eligibility using if expression to check age
# Your code here

Need a hint?

Use if age >= 18 { "Can vote" } else { "Cannot vote" } to assign the value.

3

Print the voting eligibility

Write a println! statement to print the value of voting_eligibility.

Rust

let age = 20;
let voting_eligibility = if age >= 18 { "Can vote" } else { "Cannot vote" };
# Print voting_eligibility
# Your code here

Need a hint?

Use println!("{}", voting_eligibility); to show the result.

4

Run and see the result

Run the program and observe the output. It should print Can vote.

Rust

let age = 20;
let voting_eligibility = if age >= 18 { "Can vote" } else { "Cannot vote" };
println!("{}", voting_eligibility);
# Run the program to see the output

Need a hint?

The program should print Can vote because age is 20 which is 18 or more.