C Programming – Day 2 | Operators & Expressions Explained (Interactive Guide)

OPERATORS AND EXPRESSIONS (INTERACTIVE)

DAY -2

✅ I’m marking Day-1 Completed 🎉
Now we move to:

📍 Day-2 — Operators & Expressions (Interactive)

Today you will learn:

1️⃣ Arithmetic Operators

2️⃣ Relational Operators

3️⃣ Logical Operators

4️⃣ Increment & Decrement

5️⃣ Mini Project + Quiz

After today’s tasks → I will start compiling everything.

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✅ 1. Arithmetic Operators

Operator	Meaning	Example
+	Addition	a + b
-	Subtraction	a - b
*	Multiplication	a * b
/	Division	a / b
%	Modulus (Remainder)	a % b

Example:

int a = 10, b = 3;
printf("%d", a % b); // Output: 1

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✅ 2. Relational Operators

Used for comparison, result is True(1) or False(0)

Operator	Meaning
>	Greater than
<	Less than
>=	Greater or equal
<=	Less or equal
==	Equal
!=	Not equal

Example:

printf("%d", 5 > 2); // Output: 1

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✅ 3. Logical Operators

Operator	Meaning	Example
&&	AND	True if both true
||	OR	True if any true
!	NOT	Reverse result

Example:

int a = 5, b = 10;
printf("%d", a < b && b > 0); // 1

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✅ 4. Increment / Decrement

Symbol	Meaning
++	Increase by 1
--	Decrease by 1

Example:

int x = 5;
x++; // x becomes 6

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🧪 Practice Example (Calculate Total Marks)

#include <stdio.h>

int main() {
    int m1, m2, total;

    printf("Enter two subject marks: ");
    scanf("%d %d", &m1, &m2);

    total = m1 + m2;

    printf("Total Marks = %d", total);

    return 0;
}

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✅ Task-2 (You Must Solve)

Write a program to:

✔ Input 3 subject marks
✔ Calculate Total and Average
✔ Print the result

Example Output:

Total = 250
Average = 83.33

📌 Hint: Use → total = m1 + m2 + m3;
📌 Use float for average

Send me your code — I will review ✅

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📝 Quick Quiz (Day-2)

Reply like: 1A, 2C, 3B

1️⃣ Which operator gives remainder?
A) %
B) /
C) *

2️⃣ Which operator checks equality?
A) !=
B) >
C) ==

3️⃣ Which gives "AND" logic?
A) ||
B) &&
C) !

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When you send:

✔ Task-2 Code
✔ Quiz Answers

➡ I will mark Day-2 Completed
➡ Then move to Day-3: if-else Conditions

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I’m waiting for your Task-2 solution! 🚀

✅ NEXT - DAY - 3