convert a number from base 10 to base 2 in rust

To convert a number from base 10 to base 2 in Rust, you can use the built-in functionality of the standard library. Specifically, you can use the to_string() method on the number along with the RadixFmt trait to format it as a binary string.

Here's an example implementation of this conversion:

main.rs
fn base10_to_base2(num: u32) -> String {
    format!("{:b}", num)
}
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In the example above, num is the base 10 number that you want to convert to base 2, and the returned value is a String containing the binary string representation of the input.

To use this function, simply call it with the desired base 10 number as an argument:

main.rs
let num = 42;
let binary_str = base10_to_base2(num);
println!("{}", binary_str); // prints "101010"
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This will print out the binary string representation of the base 10 number 42, which is "101010".