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# Class 12

## Sample Programs on Operations on Text Files for ISC Computer Science

Sample programming codes of the operations performed on a text file. These operations include: Creating and Writing to a Text File Reading and Displaying from a Text File Copying the records of a Text File into another Text File Deleting a record from a File Inserting a record into a File Deleting a file completely Renaming an old file to a new file name Editing/Replacing a record in a File Sorting the records stored in the file in alphabetical order Searching for a record in a file Merging 2 files into a single file

## Program for displaying the Denominations of an Amount

Java program to accept the amount from the user and display its break-up in descending order of denomination. (i.e. preference should be given to the highest denomination available) along with the total number of notes.

## Program to Check for Kaprekar Number

Program in Java (BlueJ) to input a number and check whether it is a Kaprekar number or not. A Kaprekar number is a number, whose square is found out and the sum of the left and right part of its square (divided from its middle part) is equal to the number itself.

## [Question 1 (Prime Palindrome)] ISC 2012 Practical [Solved]

Java Program for Printing all the Prime palindrome numbers in the given range. Solution of Program 1 of ISC 2012 Computer Science Practical Exam.

## Program on Decimal to Roman Number Conversion [Method 2]

This is the Second Method of Converting a Decimal Number entered by the user into its Roman Equivalent. Kindly read Method 1 also. [Note: The number entered should be within the Range 1-3999]

## Program on Decimal to Roman Number Conversion [Method 1]

This is the First method of finding the Roman equivalent of any Decimal number entered by the user. [The number entered should be within the Range 1-3999]

## Program to find the LCM of two numbers [Method 2]

This is Method 2 of finding the LCM of two given numbers and is a better way of finding the LCM compared to Method 1. It is better because, the number of times the for loop executes is reduced drastically.