Grasshopper - Personalized Message

Create a function that gives a personalized greeting. This function takes two parameters: name and owner.

Use conditionals to return the proper message:

case	return
name equals owner	‘Hello boss’
otherwise	‘Hello guest’

Code — Written §

A problem I am facing is return from a function, giving a string So let’s research about it !

The return keyword can be used to return a value inside a function’s body. When this keyword isn’t used, the last expression is implicitly considered to be the return value. If a function returns a value, its return type is specified in the signature using -> after the parentheses ().

Statement vs. Expression

• A statement does not return a value, so it cannot be used to assign a value to another variable. For example, in some languages, we may be allowed to write x = y = 5; but in Rust, let x = (let y = 5) is an invalid statement because the let y = 5 statement does not return a value that can be assigned to x.
• Expressions can be a part of a statement.
• When a semi-colon is written at the end of an expression,​ it turns into a statement and does not return a value.
• {} blocks and function calls are expressions.

As my code is;

fn greet(name: &str, owner: &str) -> String {
    if name == owner {
        "Hello boss"
    } 
    else {"Hello guest"}
}

Code — Using Match §

fn greet(name: &str, owner: &str) -> String {
    match name == owner{
        true => "Hello boss".to_string(),
        false => "Hello guest".to_string(),
    }
}

The return value is not in String, it is in str ?

• 🔼 Learn the Difference between Str and String#task

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