Comment by arwhatever

if I may elaborate on "everything is an expression," F# allows you to do things like (with apologies for being a tad rusty with the syntax)

let bar = 
    if foo then  
       7  
    else  
       11

or

let bar = 
    try
      // code that might throw
      7
    with ex ->
      11

and will ensure that both/all code branches return a compatible type for the `let` binding.

Whereas in C# you have to do like

int bar;

if (foo) {
   bar = 7;
} else {
   bar = 11;
}

And C# will let you know if you omit the `else` on accident ...

Except that most C# developers do

int bar = 0; // or some other default value`

to get the red squiggly to go away while they type the rest of the code, unknowingly subverting the compiler's safety check.

This doesn't seem like a big deal given these examples. But it becomes a much bigger deal when the if/else grows super large, becomes nested, etc.