C++ Comparison Operators

🔍 C++ Comparison Operators

Comparison (Relational) Operators ka use do values ko compare karne ke liye hota hai.
Inka result hamesha true (1) ya false (0) hota hai.

🔹 1. List of Comparison Operators

Operator Name Example
== Equal to a == b
!= Not equal to a != b
> Greater than a > b
< Less than a < b
>= Greater than or equal to a >= b
<= Less than or equal to a <= b

🔹 2. Equal to (==)

int a = 10, b = 10;
cout << (a == b);

Output: 1

🔹 3. Not Equal to (!=)

int a = 10, b = 5;
cout << (a != b);

Output: 1

🔹 4. Greater / Less Than

cout << (10 > 5); // 1
cout << (10 < 5); // 0

🔹 5. Greater or Equal / Less or Equal

cout << (10 >= 10); // 1
cout << (5 <= 3); // 0

🔹 6. Comparison with Variables

int age = 18;

if (age >= 18) {
cout << "Eligible to vote";
}

🔹 7. Comparison with boolalpha

cout << boolalpha << (5 == 3);

Output:

false

🔹 8. String Comparison

string a = "apple";
string b = "apple";

if (a == b) {
cout << "Same";
}

❌ Common Mistakes

if (a = b) // ❌ assignment operator

✔ Correct:

if (a == b)

📌 Summary

  • Comparison operators result true/false

  • Mostly used in if, while, for

  • == and = ka difference samajhna zaroori

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