The following points must be noted while constructing a real number in exponential form:
(a) The real number should contain a mantissa and an exponent.
(b) The letter ‘e’ separates the mantissa and the exponent and it can be written in lower or
upper case.
(c) The mantissa should be either a real number represented in decimal or integer form.
(d) The mantissa may be either positive or negative.
(e) The exponent should be an integer that may be positive or negative.
Some valid examples are 5.2e2,–2, 5.0e–5, 0.5e–3, etc.
In double type also the real numbers can be expressed with mantissa and exponent ...
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