[Advanced Editor] Multiple if statement in M Script

Well, you can have multiple if statements as in the query below.

I included a "let .. in"  statement for Monday, just to illustrate how that would look like.

let
    Output = if Date.DayOfWeek(DateTime.LocalNow(), Day.Monday) = 0
            then let InnerOutput = "Monday"
                  in InnerOutput
            else if Date.DayOfWeek(DateTime.LocalNow(), Day.Monday) = 1
                then "Tuesday"
                else if Date.DayOfWeek(DateTime.LocalNow(), Day.Monday) = 2
                    then "Wednesday"
                    else if Date.DayOfWeek(DateTime.LocalNow(), Day.Monday) = 3
                        then "Thursday"
                        else if Date.DayOfWeek(DateTime.LocalNow(), Day.Monday) = 4
                            then "Thank God it's Friday"
                            else "Weekend!!"
in
    Output

In general the structure of a query is like:

let
    step1 = formula,
    step2 = formula,
    ...
    stepn = formula
in
    stepn

It is not possible to create an if ... then ... else statement without a step name.