5.3.7.2 Floating-point Constants

Floating-point constants have double type unless suffixed by f or F, in which case it is a float constant. The suffixes l or L specify a long double type which is considered an identical type to double by MPLAB XC8.

Floating-point constants can be specified as decimal digits with a decimal point and/or an exponent. They can alternatively be expressed as hexadecimal digits and a binary exponent initiated with either p or P. For example:

myFloat = -123.98E12;   // decimal representation
myFloat = 0xFFEp-22;    // hexadecimal representation