It is not represented. (Remember, the biased exponent 0000 0000 is used for the value zero).

Here
is a formula that summarizes the past several pages.
In it,
`s`

is the sign bit (0 or 1), `M`

is
the mantissa (000...000 to 111...111) and `E`

is the biased exponent.

value = (-1)^{s}× 1.M × 2^{E-127}

To convert a paper-and-pencil number into IEEE floating point, fill in each piece of the picture. Let us represent 1.0 as a 32-bit IEEE 754 float.

- What is the sign bit of 1.0?
- What is the mantissa of 1.0? (Hint: remember the assumed "1." preceding the mantissa)
- What is the actual exponent of 1.0?
- What is the biased exponent of 1.0? (Hint: add the actual exponent to 127)