if-else
Beginner Level
1. Odd or Even
o Input: An integer.
o Task: Determine if the number is odd or even using if-else.
2. Maximum of Three Numbers
o Input: Three integers.
o Task: Use conditional statements to print the largest number.
3. Simple Grading System
o Input: A student's score (0–100).
o Task: Print the grade based on score (e.g., A: 90+, B: 80–89, etc.).
4. Leap Year Checker
o Input: A year.
o Task: Check if the year is a leap year using conditions.
5. Character Type Identifier
o Input: A single character.
o Task: Determine if it's a letter, digit, or special character using ASCII values
and conditions.
Intermediate Level
6. Triangle Type Checker
o Input: Three side lengths.
o Task: Determine if it is a valid triangle. If valid, say if it is equilateral,
isosceles, or scalene.
7. Number Sign Checker
o Input: A number.
o Task: Print whether it's positive, negative, or zero.
8. Simple Calculator (using switch)
o Input: Two numbers and an operator (+, -, *, /).
o Task: Perform the operation using a switch statement.
9. Day of the Week
o Input: An integer (1 to 7).
o Task: Use switch to print the corresponding day (1 = Monday, etc.).
10. Vowel or Consonant
• Input: A character.
• Task: Determine if the character is a vowel or consonant.
Loop
Beginner Level
1. Print Numbers from 1 to N
o Input: An integer N.
o Task: Use a for or while loop to print numbers from 1 to N.
2. Sum of First N Natural Numbers
o Input: An integer N.
o Task: Calculate and print the sum using a loop.
3. Multiplication Table
o Input: An integer n.
o Task: Print the multiplication table of n up to 10.
4. Factorial of a Number
o Input: An integer n.
o Task: Calculate n! using a loop.
5. Count Digits in a Number
o Input: An integer n.
o Task: Use a loop to count the number of digits.
Intermediate Level
6. Reverse a Number
o Input: An integer.
o Task: Use a loop to reverse the digits of the number.
7. Palindrome Number
o Input: An integer.
o Task: Check if the number reads the same backward using loops.
8. Sum of Digits
o Input: An integer.
o Task: Calculate the sum of all its digits using a loop.
9. Prime Number Checker
o Input: An integer n.
o Task: Use a loop to determine whether n is a prime number.
10. Pattern Printing (Stars)
• Input: An integer n.
🌟 Nested Loop Practice Problems (C++)
1. Square Pattern of Stars
• Input: n (number of rows and columns)
• Task: Print a square of stars using nested for loops.
• Example (n = 4):
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****
****
****
****
2. Right-Angled Triangle of Stars
• Input: n (number of rows)
• Task: Print a right-angled triangle.
• Example (n = 5):
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**
***
****
*****
3. Inverted Right-Angled Triangle
• Input: n
• Task: Print an inverted right triangle.
• Example (n = 4):
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****
***
**
4. Multiplication Table Grid
• Input: n (up to which number)
• Task: Print a multiplication table from 1 to n.
• Example (n = 3):
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123
246
369
5. Number Pyramid
• Input: n
• Task: Print a number triangle where each row prints numbers from 1 to that row number.
• Example (n = 4):
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12
123
1234
6. Pascal’s Triangle
• Input: n (number of rows)
• Task: Print the first n rows of Pascal’s Triangle using nested loops.
7. Hollow Square Pattern
• Input: n
• Task: Print a square of *, but only borders filled.
• Example (n = 5):
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*****
* *
* *
* *
*****
8. Diamond Pattern
• Input: n (odd number, number of total rows)
• Task: Print a diamond shape using stars. This uses nested loops and some math with
spaces.
• Example (n = 5):
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*
***
*****
***
9. Checkerboard Pattern (Alternating 1 and 0)
• Input: n (rows and columns)
• Task: Print alternating 1s and 0s like a checkerboard.
• Example (n = 4):
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1010
0101
1010
0101
10. Matrix Input & Transpose
• Task: Let the user input a 2D matrix, then use nested loops to compute and print its
transpose.
1. Sum of Two Numbers
• Task: Write a function int add(int a, int b) that returns the sum of two numbers.
• Practice Focus: Function parameters and return values.
2. Check Prime Number
• Task: Write a function bool isPrime(int n) that returns true if the number is prime, false
otherwise.
• Use Case: Can be reused in other problems like printing all primes from 1 to N.
3. Factorial Using Function
• Task: Create a function long long factorial(int n) that returns the factorial of a number.
4. Greatest Common Divisor (GCD)
• Task: Write a function int gcd(int a, int b) to compute the GCD using Euclid's algorithm.
5. Swap Two Numbers
• Task: Write a function void swap(int &a, int &b) that swaps two integers using reference
variables.
6. Find Maximum in Array
• Task: Write a function int findMax(int arr[], int size) that returns the maximum element in
an array.
• Note: Practice array handling with functions.
7. Check Palindrome (Integer or String)
• Task: Create a function bool isPalindrome(int num) or bool isPalindrome(string str).
8. Fibonacci Series (Nth Term)
• Task: Write a function int fibonacci(int n) that returns the nth Fibonacci number.
• Stretch: Use recursion and discuss performance.
9. Menu-Driven Calculator Using Functions
• Task: Write functions for add, subtract, multiply, divide, and call them from a main menu.
10. Grade Calculator
• Task: Write a function char calculateGrade(int marks) that returns a grade based on mark
ranges.
• Bonus: Add another function that averages marks from multiple subjects and then calls
calculateGrade().
Function + Loop Combo Examples
These encourage function decomposition with iteration:
11. Print All Prime Numbers from 1 to N
• Use a loop in main() and call isPrime() for each number.
12. Check Armstrong Number
• Function: bool isArmstrong(int n)
• Bonus: Loop through a range to find all Armstrong numbers.
13. Pattern Generator Function
• Function: void printTriangle(int rows) that prints a pattern using nested loops.
