Explain the differences between an algorithm and a flowchart with examples. - Students Free Notes

Explain the differences between an algorithm and a flowchart with examples.

An algorithm is a sequence of well-defined, step-by-step instructions that provide a solution to a specific problem. It is usually written in a programming language or in pseudocode and is concerned with the logical flow of solving the problem. For example, an algorithm to find the maximum of two numbers would involve comparing the two numbers and returning the greater one.

A flowchart, on the other hand, is a graphical representation of an algorithm. It uses symbols like ovals, rectangles, diamonds, and arrows to represent the steps, processes, decisions, and flow of control. For instance, the same algorithm for finding the maximum of two numbers could be represented in a flowchart where the decision-making process (comparing the two numbers) is shown in a diamond, and the resulting action is represented in a rectangle.

Example:

  • Algorithm:

    1. Start
    2. Read two numbers, A and B
    3. If A > B, print A
    4. Otherwise, print B
    5. End
  • Flowchart:
    A flowchart for this would have an oval at the top labeled “Start,” followed by a parallelogram for input (A, B), a diamond for the comparison (A > B), and two rectangles for printing the result based on the condition.

The primary difference is that algorithms describe the solution in textual form, while flowcharts provide a visual depiction, making it easier to understand and follow the logic of the problem-solving process.