Introduction to Programming-Guidelines for drawing Flowchart

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Different guidelines for drawing a flowchart are as follows:

  • All necessary requirements should be listed in a logical order while drawing a flowchart.
  • Flowchart should be clear, neat and easy to follow.
  • The usual direction of flowchart is from top to bottom or left to right.

  • Only one line should come out from process symbol.
  • Only one flow line must enter a decision symbol. But two flow lines, one for each possible answer, must come out of decision symbol.

  • Only one flow line is used with terminal symbol.

  • The start and end of flowchart must be logical.
  • The comments should be written in remarks symbol.

  • The connector should be used to reduce the number of flow lines if the flowchart becomes complex.
  • It is useful to ensure the validity of flowchart by testing it with simple data.

Limitations of Flowchart

The limitations of flowchart are as follows:

  • It is difficult to draw flowcharts for complex problems.
  • The flowchart has to be redesigned if any change is required.

Example 1

The following flowchart represents the steps for adding two numbers.

Example 2

The following flowchart represents the steps of an algorithm that inputs marks of a student. If marks are 40 or more, it displays “Pass”. Otherwise it displays “Fail”.

Example 3

The following flowchart finds the sum of first 50 natural numbers.

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