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21. Input an integer and print its digits in reverse order. For example, if you input the integer 236 The output should be 3 2 22. Input an integer and check whether it is a prime number or not. 23. Write a program to read a 4-digit number. Display the sum of all the digits. Eg: Number-2341 Sum of the digits is: 10

21. Input an integer and print its digits in reverse order. For example, if you input the integer 236 The output should be 3 2 22. Input an integer and check whether it is a prime number or not. 23. Write a program to read a 4-digit number. Display the sum of all the digits. Eg: Number-2341 Sum of the digits is: 10

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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21. Input an integer and print its digits in reverse order. For example, if you input the integer 236 The output should be 3 22. Input an integer and check whether it is a prime number or not. 23. Write a program to read a 4-digit number. Display the sum of all the digits. Eg: Number-2341 Sum of the digits is: 10
Transcribed Image Text:21. Input an integer and print its digits in reverse order. For example, if you input the integer 236 The output should be 3 22. Input an integer and check whether it is a prime number or not. 23. Write a program to read a 4-digit number. Display the sum of all the digits. Eg: Number-2341 Sum of the digits is: 10
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