Relational Operators

 

💻 Relational Operators in C (Easy + Clear Explanation)

In C (developed by Dennis Ritchie), relational operators are used to compare two values 🔍

👉 The result is always:

• 1 → True ✅
• 0 → False ❌

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🔹 What are Relational Operators? 🤔

They are used to check conditions like:

• Equal or not
• Greater or smaller

👉 Mostly used in if conditions and loops

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🔹 Types of Relational Operators

Operator	Meaning	Example	Result
==	Equal to	a == b	True if equal
!=	Not equal	a != b	True if not equal
>	Greater than	a > b	True if a is bigger
<	Less than	a < b	True if smaller
>=	Greater or equal	a >= b	True if ≥
<=	Less or equal	a <= b	True if ≤

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🔹 Examples of Each Operator

#include <stdio.h>

int main() {
    int a = 10, b = 5;

    printf("%d\n", a == b);  // 0
    printf("%d\n", a != b);  // 1
    printf("%d\n", a > b);   // 1
    printf("%d\n", a < b);   // 0
    printf("%d\n", a >= b);  // 1
    printf("%d\n", a <= b);  // 0

    return 0;
}

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🔹 Output 🎉

0
1
1
0
1
0

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🔹 Using Relational Operators in if Statement 🧠

#include <stdio.h>

int main() {
    int a = 10, b = 5;

    if (a > b) {
        printf("a is greater");
    }

    return 0;
}

👉 Output:

a is greater

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🔹 Important Points ⚠️

✔ == is comparison, = is assignment ❗
✔ Result is always 1 (true) or 0 (false)
✔ Used in conditions (if, while, for)

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❗ Common Mistake

if (a = b)   // ❌ wrong (assignment)

👉 Correct:

if (a == b)  // ✅ correct (comparison)

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🔹 Real-Life Example 🤔

👉 == → checking equality (marks same?)
👉 > → who scored more 📊
👉 < → who scored less

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🔹 Final Summary 📝

• Used to compare values 🔍
• Return true (1) or false (0)
• Important for decision making