The Free On-line Dictionary of Computing (30 December 2018):
(Or "do loop") A loop construct found in many
procedural languages which repeatedly executes some
instructions while a condition is true.
Repeat loops are found in Perl, Pascal, BASIC and C.
The initial keyword may be "repeat" or "do" and the
condition may be introduced with a "while" or "until" keyword.
In constrast to a while loop, the "loop body" is executed
once before the condition is tested. This is useful when the
condition depends on the action of the loop body. In the
following BASIC loop "Hello" is printed once despite the fact
that the condition is false;
i = 2
i = i+1
See also while loop and for loop.