If Then Else Statement Definition/Meaning:
The most basic conditional construct in a programming
language, allowing selection between two alternatives, dependent on the truth or
falsity of a given condition. Most languages also provide an if ... then construct to allow conditional execution of a single statement or group of
statements. Primitive languages such as BASIC restrict the facility to a
conditional transfer of control, e.g.
"IF A → 0 THEN 330"
which is reminiscent
of the conditional jump provided in the order code of every CPU. See also