Rust Function: Celsius to Fahrenheit conversion

Last update on June 07 2025 13:04:59 (UTC/GMT +8 hours)

Write a Rust function to convert a temperature value from Celsius to Fahrenheit.

Sample Solution:

Rust Code:

// Define a function named 'celsius_to_fahrenheit' that takes a temperature in Celsius as input and returns the temperature in Fahrenheit
fn celsius_to_fahrenheit(celsius: f64) -> f64 {
    // Convert Celsius to Fahrenheit using the formula: (Celsius * 9/5) + 32
    (celsius * 9.0 / 5.0) + 32.0
}

fn main() {
    let celsius_temperature = 25.0; // Define the temperature in Celsius

    // Call the 'celsius_to_fahrenheit' function with the specified Celsius temperature
    let fahrenheit_temperature = celsius_to_fahrenheit(celsius_temperature);

    // Print the converted temperature in Fahrenheit
    println!("Temperature in Celsius: {}°C", celsius_temperature);
    println!("Temperature in Fahrenheit: {}°F", fahrenheit_temperature);
}

Output:

Temperature in Celsius: 25°C
Temperature in Fahrenheit: 77°F

Explanation:

Here's a brief explanation of the above Rust code:

'fn celsius_to_fahrenheit(celsius: f64) -> f64 { ... }': This is a function named 'celsius_to_fahrenheit' that takes a temperature in Celsius as input (of type 'f64', a 64-bit floating-point number) and returns the equivalent temperature in Fahrenheit (also of type 'f64').
Inside the function:

We convert the temperature from Celsius to Fahrenheit using the formula: '(Celsius * 9/5) + 32'.

In the 'main' function:

Define the temperature in Celsius ('celsius_temperature').
Call the 'celsius_to_fahrenheit' function with the specified Celsius temperature and store the result in 'fahrenheit_temperature'.
Finally we print both the original temperature in Celsius and the converted temperature in Fahrenheit.

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