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Python type() Function

When learning Python, you will work with different types of data, such as numbers, text, decimal values, and Boolean values. Python provides several built-in functions to help you work with these data types. One of the most useful functions is the type() function . The type() function tells you the data type of a value or variable. It helps you understand what kind of data Python is working with and can make debugging your programs easier. For example, consider these variables: age = 20 price = 99.50 name = "Rahul" is_student = True Although all four variables store data, their data types are different. Python allows us to check these types using type() . Let's understand how it works with simple examples. 1. What Is the type() Function in Python? The type() function is a built-in Python function that returns information about the type of an object. In beginner-level programming, you can use it to check whether a value is an integer, a floating-point number, a string,...
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Write a Program in Java to Count How Many Ones Are Present in a Number

Problem Statement

Write a Java program to check how many times digit 1 occurs in a given number.

🔍 Explanation (Simple Words)

  • We take a number from the user

  • Extract each digit using % 10

  • Check if the digit is equal to 1

  • If yes, increase the count

  • Remove the last digit using / 10

  • Repeat until the number becomes 0

🧠 Algorithm

  1. Start

  2. Read the number

  3. Initialize count = 0

  4. While number ≠ 0

    • digit = number % 10

    • If digit == 1 → count++

    • number = number / 10

  5. Print count

  6. End

💻 Java Program to Count Number of Ones

import java.util.Scanner;

public class CountOnes {
    public static void main(String[] args) {
        int number, count = 0;

        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number: ");
        number = sc.nextInt();

        while (number != 0) {
            int digit = number % 10;
            if (digit == 1) {
                count++;
            }
            number = number / 10;
        }

        System.out.println("Number of ones: " + count);
    }
}

🧪 Dry Run

Input

number = 12131
count = 0
Stepnumberdigitcount
11213111
2121331
312112
41222
5113

Final Output

Number of ones: 3

🖥️ Output

Enter a number: 12131
Number of ones: 3

📌 Important Points for Exams

  • % 10 → extracts last digit

  • / 10 → removes last digit

  • Works for any integer number

  • Time Complexity: O(n)

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