4.0. Conditions In this chapter, the REXX concept of “conditions” is described. Conditions allow the programmer to handle abnormal control flow, and enable him to assign special pieces of REXX code to be executed in case of certain incidences. · In the first section the concept of conditions is explained. · Then, there is a description of how a standard condition in REXX would work, if it existed. · In the third section, all the existing conditions in REXX are presented, and the differences compared to the standard condition described in the previous section are listed. · The fourth sections contains a collections of random notes on the conditions in REXX. · The last section describes differences, extensions and peculiarities in Regina on the of subject conditions, and the lists specific behavior.