Keysight Technologies 3458A Guide D'utilisation page 396

7 BASIC Language for the 3458A
90 !
100 OUTPUT 722; "CALL TESTER"
110 END
You may find that the equality test fails due to rounding errors or other errors
caused by the inherent limitations of finite machines. A repeating decimal or
irrational number cannot be represented exactly in any finite machine like the
3458AA.
A good example of equality error occurs when multiplying or dividing numbers. A
product of two non-integer values nearly always results in more digits to the right
of the decimal point than existed in either of the two numbers being multiplied.
396 Keysight 3458A User's Guide