What is an algorithm?
Algorithm is a procedure or step by step process for solving
a problem.
- Algorithms can be expressed using different kinds of notations, including pseudocode, flowcharts, programming languages and natural languages.
- Computer algorithm is an instance of logic written in computer software by the programmers.
Let’s learn some of the algorithm. Sample problem definition
and algorithm is given below:
1. Problem Definition: Write an
algorithm to add given two numbers.
Step 1: Start.
Step 2: Read two numbers A and B.
Step 2: Read two numbers A and B.
Step 3: Total = A+B.
Step 4: Display Total.
Step 5: Stop.
Click here to learn how to convert this algorithm in to C program.
2. Problem Definition: Write an algorithm for Subtracting two Numbers.
Step 1: Start.
Step 2: Read two numbers A and B.
Step 2: Read two numbers A and B.
Step 3: Answer = A - B.
Step 4: Display SUB.
Step 5: Stop.
3. Problem
Definition: Write an algorithm to find factorial of a given number.
Step
1: Start
Step
2: Declare variables: N, fact, i.
Step
3: Initialize variables
fact = 1
i = 1
Step
4: Read value of N from user.
Step
5: Repeat following steps until i = N
fact = fact * i
i = i + 1
Step
6: Print fact variable.
Step
7: Stop
4. Problem
Definition: Write an algorithm to multiply given two numbers.
Step 1: Start.
Step 2: Read two numbers A and B.
Step 2: Read two numbers A and B.
Step 3: Answer = A * B.
Step 4: Display Answer.
Step 5: Stop.
5. Problem
Definition: Write an algorithm for dividing given two numbers.
Step 1: Start.
Step 2: Read two numbers A and B.
Step 2: Read two numbers A and B.
Step 3: Answer = A / B.
Step 4: Display Answer.
Step 5: Stop.
C programs of known algorithms
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