rustHow can I add leading zeros to a string in Rust?

Adding leading zeros to a string in Rust can be done using the format! macro. The format! macro takes a format string and a list of arguments and returns a String object. The format string can contain placeholders for the arguments, and the placeholders can be used to add leading zeros.

Example code

let num = 5;
let result = format!("{:02}", num);
println!("{}", result);

Output example

05

Code explanation

• let num = 5;: This line declares a variable num and assigns it the value 5.
• let result = format!("{:02}", num);: This line uses the format! macro to create a String object with the value 05. The :02 placeholder tells the macro to add leading zeros to the number until it is two digits long.
• println!("{}", result);: This line prints the String object to the console.

Helpful links

• Rust Documentation - format!

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