Summary -

In this topic, we described about the Programming Construction with detailed example.

Application program is a set of executable statements. In a day to day needs, the program executing flow needs a change like below -

  • Some part of the code needs to be executed in sequence.
  • Some part of the statements needs to execute based on conditions.
  • Some part of the statements needs to be executed repeatedly.

Based on the above needs, programming construction mainly divided into below three types –

ApproachDescription
Sequence Programming Construction Sequence programming construction involves in making the program execution in sequence.
In sequence programming construction, the statements executed one by one in the order how they coded.
Selective Programming Construction Selective programming construction involves making the set of statements runs in conditional/selective manner.
In selective programming construction, the statements execution decides by a condition.
Iterative Programming Construction Iterative programming construction involves making the set of statements runs in repetitive/iterative/looping manner.
In iterative programming construction, the statements execute repeatedly until the specified condition is true.

Every COBOL statement fits to any of the above three programming constructions.