Which is a valid decimal number?
A decimal number can start with dot also, like . 34, -. 12, so dot also can be at the first position. But a decimal number should have only one dot.
toFixed() returns a string representation of numObj that does not use exponential notation and has exactly digits digits after the decimal place. The number is rounded if necessary, and the fractional part is padded with zeros if necessary so that it has the specified length.
The Math.floor () method rounds the number downwards to the next integer (having lower value). Going by the name it returns the “floor” integer of a number.