A brief idea about application of structural programming technique in the construction of system software?
is it top-down Analysis or modular programming? or something else ?
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1SO is not a right place to ask Opinion based questions... – Zain Arshad Apr 18 '19 at 09:39
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Assuming you mean 'structured programming', it's a design discipline that arose in the 50s and 60s based on using a limited set of control-flow structures: alternatives (if-then-else), selection (case), repetition (for, while loops), procedures (aka subroutines), and lexically-scoped blocks.
This was contrasted with arbitrary code flow through unconstrained use of 'goto', arbitrary coupling through global variables, etc.
It is closely associated with top-down design, also referred to as stepwise refinement.
These days it's pretty usual for any procedural programming language to supply structured-programming constructs as a normal matter.