contract;
 
// if, else if, else
// if let
 
abi MyContract {
    fn test_func(x: u64) -> u64;
}
 
impl MyContract for Contract {
    fn test_func(x: u64) -> u64 {
        // if, else if, else
        if x < 10 {
            // do something
        } else if x < 20 {
            // do something else
        } else {
            // do something else
        }
 
        // if let
        let mut y = 0;
        if x < 10 {
            y = x * x;
        } else {
            y = x + 1;
        }
 
        // Assign the outcome of if statements to the variable y
        let y = if x < 10 {
            // do something, for example
            x * x
        } else {
            // do something else, for example
            x + 1
        }; // Notice semicolon here
 
        y
    }
}