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Added interactive quizzes in Python docs modules
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‎docs/python/conditional-statements-python.md‎

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### 🧠 Quiz 1: Basic Conditionals
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**Question 1:** What will be the output of the following code?
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```python
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x = 7
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if x > 10:
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print("Large")
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else:
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print("Small")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `Small`
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**Explanation:** Since 7 is not greater than 10, the condition `x > 10` is False, so the `else` block executes and prints "Small".
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</details>
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**Question 2:** What does `elif` stand for in Python?
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** "else if"
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**Explanation:** `elif` is short for "else if" and is used to check multiple conditions in sequence.
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</details>
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---
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## Nested `if` Statements
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You can put an `if` statement inside another `if` statement.
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### 🧠 Quiz 2: Ternary Operator & Nested Conditions
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**Question 1:** What will the variable `result` contain after this code runs?
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```python
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temperature = 25
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result = "Hot" if temperature > 30 else "Cold"
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `"Cold"`
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**Explanation:** Since 25 is not greater than 30, the condition is False, so the value after `else` ("Cold") is assigned to `result`.
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</details>
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**Question 2:** What will be printed by this nested if statement?
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```python
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x = 12
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if x > 5:
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if x < 15:
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print("Valid")
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else:
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print("Too high")
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else:
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print("Too low")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `Valid`
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**Explanation:** First, `x > 5` is True (12 > 5), so we enter the outer if block. Then, `x < 15` is also True (12 < 15), so "Valid" is printed.
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</details>
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---
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## Logical Operators in Conditions
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You can combine multiple conditions using `and`, `or`, and `not`.
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### 🧠 Quiz 3: Logical Operators
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**Question 1:** What will be the output?
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```python
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a = 10
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b = 20
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if a > 5 and b < 15:
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print("Both true")
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else:
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print("At least one false")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `At least one false`
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**Explanation:** While `a > 5` is True (10 > 5), `b < 15` is False (20 is not less than 15). Since `and` requires both conditions to be True, the result is False and the else block executes.
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</details>
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**Question 2:** What does this code print?
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```python
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x = 8
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if not x == 8:
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print("Not eight")
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else:
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print("Is eight")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `Is eight`
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**Explanation:** `x == 8` is True, but the `not` operator negates it to False. So the if condition fails and the else block runs, printing "Is eight".
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</details>
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---
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## Indentation Rules
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In Python, indentation is important for defining code blocks.
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#### 3. **Age Eligibility for Voting**
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Write a program to take a person’s age as input and check if they are **eligible to vote** (18 years or older).
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Write a program to take a person's age as input and check if they are **eligible to vote** (18 years or older).
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#### 4. **Largest of Two Numbers**
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Write a program that asks the user to enter a **username** and **password**.
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* If the username is `"admin"` and the password is `"12345"`, print **“Login Successful”**.
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* Otherwise, print **“Invalid credentials”**.
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* If the username is `"admin"` and the password is `"12345"`, print **"Login Successful"**.
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* Otherwise, print **"Invalid credentials"**.
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---
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### 🧠 Quiz 4: Code Output Prediction
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**Question 1:** What will this code output?
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```python
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marks = 82
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if marks >= 90:
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print("A")
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elif marks >= 75:
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print("B")
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elif marks >= 60:
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print("C")
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else:
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print("D")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `B`
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**Explanation:** The code checks conditions in order. Since 82 is not ≥ 90 but is ≥ 75, it prints "B" and stops checking further conditions.
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</details>
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**Question 2:** Predict the output:
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```python
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fruits = ["apple", "banana", "cherry"]
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if "mango" in fruits:
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print("Found")
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else:
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print("Not found")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `Not found`
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**Explanation:** "mango" is not in the fruits list, so the condition is False and the else block executes.
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</details>
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---
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### 🧠 Quiz 5: Challenge Questions
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**Question 1:** What's wrong with this code?
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```python
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x = 5
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if x > 3:
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print("Greater")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** Missing indentation
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**Explanation:** The print statement must be indented to be inside the if block. Python uses indentation to define code blocks, and this code will raise an `IndentationError`.
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</details>
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**Question 2:** What will be printed?
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```python
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year = 2024
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if year % 4 == 0 and year % 100 != 0:
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print("Leap")
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elif year % 400 == 0:
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print("Leap")
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else:
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print("Not Leap")
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```
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:** `Leap`
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**Explanation:** 2024 is divisible by 4 (2024 % 4 == 0) and not divisible by 100 (2024 % 100 == 24, not 0), so the first condition is True and "Leap" is printed.
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</details>
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**Question 3:** Write a single line of code using a ternary operator to assign "Pass" to a variable `result` if `score` is 50 or more, otherwise assign "Fail".
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<details>
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<summary>Click to reveal answer</summary>
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**Answer:**
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```python
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result = "Pass" if score >= 50 else "Fail"
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```
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**Explanation:** The ternary operator format is `value_if_true if condition else value_if_false`.
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</details>
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---
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## Conclusion
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Conditional statements are essential for decision-making in programs. Mastering `if`, `elif`, and `else` allows you to control your program's logic effectively.
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Conditional statements are essential for decision-making in programs. Mastering `if`, `elif`, and `else` allows you to control your program's logic effectively.

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