if get key and float bigger as

Hey
i want to check somehting pretty easy.
if a key is pressed(F) and if a float is under 1,5

i thought it would be this:

if (Input.GetKey(KeyCode.F)) && dist > 1,5; 
{
//do stuff
}

but i get an " Unexpected symbol `&&'"
is there something wrong?

if (Input.GetKey(KeyCode.F) && dist > 1.5f)
{
//do stuff
}