20 IF–ELSE Statement Questions in C++ with Answers (Beginner Friendly)

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Introduction

The if–else statement is one of the most important decision-making statements in C++ programming.
It allows a program to execute different blocks of code based on a condition.

If you are a beginner, preparing for:

  • College exams

  • Coding interviews

  • Competitive programming

then practicing if–else questions is very important.

👉 In this article, you will learn 20 important if–else statement questions in C++ with answers and examples.

What is IF–ELSE Statement in C++?

The if–else statement is used to check conditions.

Syntax:

if(condition) {
    // code if condition is true
}
else {
    // code if condition is false
}

20 Important IF–ELSE Statement Questions in C++

1. Program to check whether a number is even or odd

int n = 10;
if(n % 2 == 0)
    cout << "Even";
else
    cout << "Odd";

✅ Output: Even

2. Check whether a number is positive, negative or zero

int n = -5;
if(n > 0)
    cout << "Positive";
else if(n < 0)
    cout << "Negative";
else
    cout << "Zero";

✅ Output: Negative

3. Find the greatest of two numbers

int a = 10, b = 20;
if(a > b)
    cout << a;
else
    cout << b;

✅ Output: 20

4. Find the greatest of three numbers

int a = 5, b = 9, c = 3;
if(a > b && a > c)
    cout << a;
else if(b > c)
    cout << b;
else
    cout << c;

✅ Output: 9

5. Check voting eligibility

int age = 17;
if(age >= 18)
    cout << "Eligible for Voting";
else
    cout << "Not Eligible";

✅ Output: Not Eligible

6. Check pass or fail

int marks = 35;
if(marks >= 40)
    cout << "Pass";
else
    cout << "Fail";

✅ Output: Fail

7. Program to check leap year

int year = 2024;
if(year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
    cout << "Leap Year";
else
    cout << "Not a Leap Year";

✅ Output: Leap Year

8. Check whether a character is vowel or consonant

char ch = 'a';
if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
    cout << "Vowel";
else
    cout << "Consonant";

✅ Output: Vowel

9. Check whether a number is divisible by 5

int n = 25;
if(n % 5 == 0)
    cout << "Divisible by 5";
else
    cout << "Not Divisible by 5";

✅ Output: Divisible by 5

10. Check profit or loss

int cp = 100, sp = 80;
if(sp > cp)
    cout << "Profit";
else if(sp < cp)
    cout << "Loss";
else
    cout << "No Profit No Loss";

✅ Output: Loss

11. Check whether a character is an alphabet

char ch = '9';
if((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z'))
    cout << "Alphabet";
else
    cout << "Not an Alphabet";

✅ Output: Not an Alphabet

12. Check whether a number is zero

int n = 0;
if(n == 0)
    cout << "Zero";
else
    cout << "Non-Zero";

✅ Output: Zero

13. Check temperature condition

int temp = 30;
if(temp > 25)
    cout << "Hot Weather";
else
    cout << "Cold Weather";

✅ Output: Hot Weather

14. Check eligibility for driving license

int age = 19;
if(age >= 18)
    cout << "Eligible for Driving License";
else
    cout << "Not Eligible";

✅ Output: Eligible for Driving License

15. Check whether number is divisible by 3 and 7

int n = 21;
if(n % 3 == 0 && n % 7 == 0)
    cout << "Divisible by 3 and 7";
else
    cout << "Not Divisible";

✅ Output: Divisible by 3 and 7

16. Program to find grade

int marks = 85;
if(marks >= 90)
    cout << "Grade A";
else if(marks >= 75)
    cout << "Grade B";
else if(marks >= 50)
    cout << "Grade C";
else
    cout << "Fail";

✅ Output: Grade B

17. Check whether a character is uppercase

char ch = 'G';
if(ch >= 'A' && ch <= 'Z')
    cout << "Uppercase Letter";
else
    cout << "Not Uppercase";

✅ Output: Uppercase Letter

18. Check bonus eligibility

int salary = 25000;
if(salary >= 30000)
    cout << "Bonus Available";
else
    cout << "No Bonus";

✅ Output: No Bonus

19. Check whether number is a 3-digit number

int n = 345;
if(n >= 100 && n <= 999)
    cout << "Three Digit Number";
else
    cout << "Not a Three Digit Number";

✅ Output: Three Digit Number

20. Simple login validation

int pin = 1234;
if(pin == 1234)
    cout << "Access Granted";
else
    cout << "Access Denied";

✅ Output: Access Granted

Advantages of IF–ELSE Statement

  • Easy to understand

  • Controls program flow

  • Used in real-life decision making

  • Very important for interviews

Conclusion

The if–else statement in C++ is a core concept that every beginner must master.
Practicing these 20 if–else questions with answers will help you build logic and confidence.

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