Editing Turbo Pascal (section)

===Floating-point arithmetic===
There were several [[floating point]] types, including <code>single</code> (the 4-byte [IEEE 754] representation) <code>double</code> (the 8-byte IEEE 754 representation), <code>extended</code> (a 10-byte IEEE 754 representation used mostly internally by numeric [[coprocessor]]s) and <code>Real</code> (a 6-byte representation).

In the early days, <code>Real</code> was the most popular. Most PCs of the era did not have a floating-point [[coprocessor]] so all floating-point arithmetic had to be done in software. Borland's own floating-point algorithms on <code>Real</code> were quicker than using the other types, though its library also [[emulation (computing)|emulated]] the other types in software.