Square Root of a Number | Write a program in Java to find the square root of a number without using Math.sqrt(). | ISC Computer Science | ICSE Computer Applications

Posted by on
Square root of a number

Algorithm

  1.   Start
  2. n:=0
  3. i:=0
  4. k:=0
  5. Print "Enter a number"
  6. Read n
  7. i=1;
  8. k=0
  9. If i*i<=n, go to step 10 or else go to step 15
  10. If i*i==n, go to step 11 or else go to step 13
  11. k++.
  12. Go to step 
  13. i++.
  14. Go to step 9
  15. If k>0, go to step 16 or else go to step 17
  16. Print "The square root is "+i. Go to step 18
  17. Print "The given number is not a perfect square"
  18. Stop

Program

Buffered Reader

import java.io.*;
class SquareRoot
{
    int n, i, k;
    
    void accept() throws IOException
    {
        BufferedReader br=new BufferedReader (new InputStreamReader (System.in));
        System.out.println("Enter a number");
        n=Integer.parseInt(br.readLine());
    }
    
    void root()
    {
        i=1;
        k=0;
        while(i*i<=n)
        {
            if(i*i==n)
            {
                k++;
                break;
            }
            i++;
        }
    }
    
    void display()
    {
        if(k>0)
        {
            System.out.println("The square root is "+i);
        }
        else
        {
            System.out.println("The given number is not a perfect square");
        }
    }
    
    void main() throws IOException
    {
        accept();
        root();
        display();
    }
}

Scanner

import java.util.*;
class SquareRoot
{
    int n, i, k;
    
    void accept()
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter a number");
        n=sc.nextInt();
    }
    
    void root()
    {
        i=1;
        k=0;
        while(i*i<=n)
        {
            if(i*i==n)
            {
                k++;
                break;
            }
            i++;
        }
    }
    
    void display()
    {
        if(k>0)
        {
            System.out.println("The square root is "+i);
        }
        else
        {
            System.out.println("The given number is not a perfect square");
        }
    }
    
    void main() 
    {
        accept();
        root();
        display();
    }
}

Documentation

Variable Description

 Data TypeVariable NameDescription
 intn To accept a number from the user  
 inti To store the square root of the number 
 intk To act as a counter variable  

Method Description

 Return TypeMethod NameDescription
 voidaccept() To accept data from the user 
 voidroot() To find the square root of the number 
 voiddisplay() To display the result of the program 
 voidmain() To act as an entry gateway for the compiler. 

Output


Square root of number output




Share with all ISC Computer Science Students you know.

Comment below with all your program requests and blog suggestions.

Follow us on social media by clicking on these links. 
Instagram : @ISCJavaCode
Twitter: @ISCJavaCode
Quora: ISC Java Code
Reddit: @ISCJavaCode
Pinterest: @ISCJavaCode
Facebook: @ISCJavaCode
LinkedIn : ISC Java Code 


Stay Healthy
Stay Happy
Stay Helpful



Comments

Post a Comment

You might also like:

Conversion of Complex Sentences to Simple Sentences

In this blog, we shall look at the various methods applied for the conversion of a Complex Sentences to Simple Sentences . The following examples have been taken from the english language textbook prescribed for ISC students studying in class 11. Use these as practice and climb your stepping stones to better grammar! A complex sentences can be converted to a simple sentence by changing a noun clause, an adjective clause or an adverb clause, as shown below: Noun Clause Complex:Tell me where you live. Simple:Tell me your address. Complex:That you should be present is essential. Simple:Your presence is essential. Adjective Clause Complex:Time which is once lost is lost forever. Simple:Time once lost is lost forever. Complex:I have no advice that I can offer you. Simple: I have no advice to offer you. Adverb Clause Complex:When he had finished his work, he went out to play. Simple:Having finished his work, he went out to play. Complex:If I make a promise, I will ke

Conversion of Compound Sentences to Complex Sentences.

In this blog, we shall see the rules and guidelines that govern the conversion of compound sentences to complex sentences. The examples given below are taken from the assignment given in section B of Unit 2 in the English Language textbook prescribed for ISC class 11.  It is possible to change a Compound Sentence to a Complex sentence by changing one of the Coordinate Clauses to a Subordinate Clause. Coordinate Clause-  one of two or more clauses in a sentence that are of equal importance and usually joined by  and, or , or  but. Subordinate clause -  a clause, typically introduced by a conjunction, that forms part of and is dependent on a main clause. Compound: He is industrious but he is dull. Complex:He is industrious though he is dull. Compound:Act on my advice or you will come to grief. Complex:If you do not act on my advice, you will come to grief. Assignment Compound:Ask no questions and you will hear no lies. Complex: If you ask no questions, you will hear no

Conversion of Complex Sentences to Compound Sentences

In this blogpost, we shall see the rules and guidelines that determine the conversion of Complex Sentences to Compound Sentences. The given examples have been taken from part B of Unit 2 in the English Language textbook prescribed for ISC class 11. We can change a Complex Sentence to a Compound Sentence by changing a Subordinate Clause into a Coordinate Clause. Coordinate Clause-  one of two or more clauses in a sentence that are of equal importance and usually joined by  and, or , or  but. Subordinate clause -  a clause, typically introduced by a conjunction, that forms part of and is dependent on a main clause. Complex: I have now found the pen that I had lost. Compound:I had lost the pen, but I have found it now. Complex: As soon as he saw the monkey, he ran away. Compound:He saw the monkey, and at once he ran away. Assignment Complex: If you do not run, you will not be in time. Compound: Run, or you will not be in time. Complex: She went away beca