If Let Operator
Concise control flow with if let
Combining if and let allows you to handle values that match one of the patterns while disregarding the remaining code. This is done with the if let syntax. The “if let” expression and the “match” operator operate similarly.
Example of match operator
fn main()
{
let a = Some(5);
match a {
Some(5) => println!("five"),
_ => (),
}}
Output:
five
When the value in the example above equals Some(5), the match operator runs the code. After running the first variant, the “_=>()” expression satisfies the match expression. The length of the code is decreased if we use if let in instead of match.
Example of if let
fn main()
{
let a=Some(3);
if let Some(3)=a{
println!("three");
}
}
Output:
three
