NCERT Book Class 11 Computer Science Algorithms and Flowcharts

Introduction

Algorithm is a step-by-step process of solving a well-defined computational problem. In

practice, in order to solve any complex real life problems, first we have to define the

problem and then, design algorithm to solve it. Writing and executing a simple

program may be easy; however, for executing a bigger one, each part of the program

must be well organized. In short, algorithms are used to simplify the program

implementation. The next step is making the flowchart. It is a type of diagram that

represents an algorithm or process, showing the steps as „boxes‟ of various kinds and

their order by connecting them with arrows. Then, the flowchart will be converted into

program code.

Algorithm

An algorithm is an effective method expressed as a finite list of well defined

instructions for calculating a function, starting from an initial state and initial input. The

instructions describe a computation, which will eventually produce output, when

executed. We can use algorithm to solve any kind of problems. However, before writing

a program, we need to write the steps to solve the problem in simple English language.

This step-by-step procedure to solve the problem is called algorithm.

Example

Let us take one simple day-to-day example by writing algorithm for making „Maggi

Noodles‟ as a food.

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