Question

Is it necessary to specify f while initiating a float type variable.

float a =3455.67f;

If I declare and initiate it as

float a = 3455.67;

Then what will happen?

Answer 1

The documentation on float says:

By default, a real numeric literal on the right side of the assignment
operator is treated as double. Therefore, to initialize a float
variable, use the suffix f or F.

This means that if you do float a = 3455.67; then the compiler will refuse to implicitly convert the double to a float.