Floating-point Literals

Floating-point Literals

A floating-point literal has an integer part, a decimal point, a fractional part, and
an exponent part. You can represent floating point literals either in decimal form
or exponential form.
While representing decimal form, you must include the decimal point, the
exponent, or both; and while representing exponential form, you must include
the integer part, the fractional part, or both. The signed exponent is introduced
by e or E.
Here are some examples of floating-point literals:

3.14159                       /* Legal */ 314159E-5L               /* Legal */ 510E                           /* Illegal: incomplete exponent */ 210f                            /* Illegal: no decimal or exponent */ .e55                             /* Illegal: missing integer or fraction */