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Definition of Flowchart

A flowchart is the graphical or pictorial representation of an algorithm with the help of different symbols, shapes and arrows in order to demonstrate a process or a program. With algorithms, we can easily understand a program. The main purpose of a flowchart is to analyze different processes. Several standard graphics are applied in a flowchart:

Terminal Box - Start / End

How to Use Flowcharts to Represent Algorithms

Now that we have the definitions of algorithm and flowchart, how do we use a flowchart to represent an algorithm?

Algorithms are mainly used for mathematical and computer programs, whilst flowcharts can be used to describe all sorts of processes: business, educational, personal and of course algorithms. So flowcharts are often used as a program planning tool to visually organize the step-by-step process of a program. Here are some examples:

Example 1: Print 1 to 20:

Algorithm:

Step 1: Initialize X as 0,

Step 2: Increment X by 1,

Step 3: Print X,

Step 4: If X is less than 20 then go back to step 2.

Example 2: Convert Temperature from Fahrenheit (℉) to Celsius (℃)

Algorithm:

Step 1: Read temperature in Fahrenheit,

Step 2: Calculate temperature with formula C=5/9*(F-32),

Step 3: Print C,

These examples will help you get a better understanding of flowchart techniques.

Example 1: Calculate the Interest of a Bank Deposit

Algorithm:

Step 1: Read amount,

Step 2: Read years,

Step 3: Read rate,

Step 4: Calculate the interest with formula "Interest=Amount*Years*Rate/100

Step 5: Print interest

Example 2: Determine and Output Whether Number N is Even or Odd

Algorithm:

Step 1: Read number N,

Step 2: Set remainder as N modulo 2,

Step 3: If remainder is equal to 0 then number N is even, else number N is odd,