Floating-point literals can be assigned to
1 program realDemo(input, output, stderr); 2 3 var 4 r: real; 5 6 begin 7 r := 0.; // r becomes zero 8 writeLn(r, ' ', r:8:4); 9 10 r := 1e2; // r becomes 1*(10^2) [a hundred] 11 writeLn(r, ' ', r:8:4); 12 13 r := r / r; // r becomes one 14 writeLn(r, ' ', r:8:4); 15 end.
Note, that the result of the
/-division can be assigned.
The internal representation of the type
real (i.e. number of bytes and byte ordering) and the resulting range and precision are platform dependent.
Quote from the “FreePascal Programmer's Manual” (Chapter 8.2.5 Floating point types):
Contrary to Turbo Pascal, where the
realtype had a special internal format, under Free Pascal the
realtype simply maps to one of the other real types. It maps to the
doubletype on processors which support floating point operations, while it maps to the
singletype on processors which do not support floating point operations in hardware.
|simple data types|
|complex data types|