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 –
|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.