Rust Program: Integer-String conversion

Last update on June 07 2025 13:03:50 (UTC/GMT +8 hours)

Write a Rust program that converts an integer to a string and vice versa and prints the result.

Sample Solution:

Rust Code:

fn main() {
    // Convert integer to string
    let integer_value = 42;
    let string_value = integer_value.to_string();
    println!("Integer to string: {}", string_value);

    // Convert string to integer
    let string_value = "123";
    let parsed_integer: Result = string_value.parse();
    match parsed_integer {
        Ok(int_value) => println!("String to integer: {}", int_value),
        Err(_) => println!("Failed to parse string to integer"),
    }
}

Output:

Integer to string: 42
String to integer: 123

Explanation:

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

Convert integer to string:
We declare an integer variable 'integer_value' and initialize it with the value 42.
We use the "to_string()" method to convert 'integer_value' to a "String" and store the result in the variable 'string_value'.
We print the converted string value using "println!()".
Convert string to integer:
We declare a string variable 'string_value' and initialize it with the string "123".
We use the parse() method to parse 'string_value' into an integer. Since parse() returns a 'Result', we use pattern matching (match) to handle both success and error cases.
In the success case (Ok(int_value)), we print the parsed integer value.
In the error case (Err(_)), we print a message indicating parsing failure.

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