Python – Class & Objects

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🧠 Python If-Else Statement – Notes in Simple Hinglish

➤ if statement

if condition:
    # agar condition true ho to yeh chalega

Example:

age = 18
if age >= 18:
    print("You are eligible to vote.")

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➤ if-else statement

if condition:
    # true
else:
    # false

Example:

marks = 35
if marks >= 33:
    print("Pass")
else:
    print("Fail")

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➤ if-elif-else

if condition1:
    # true
elif condition2:
    # true
else:
    # all false

Example:

num = 0
if num > 0:
    print("Positive")
elif num < 0:
    print("Negative")
else:
    print("Zero")

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🔁 Python For Loop – Notes in Simple Hinglish

for variable in range(start, end):
    # loop chalega

➤ Basic Example:

for i in range(5):
    print(i)

Output:

0
1
2
3
4

➤ Using range(start, end, step):

for i in range(1, 11, 2):
    print(i)

Output:

1
3
5
7
9

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✅ Practice Exercises with Solutions

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Q1. Ek number input lo. Agar vo even ho to "Even" print karo, warna "Odd" print karo.

num = int(input("Enter a number: "))
if num % 2 == 0:
    print("Even")
else:
    print("Odd")

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Q2. 1 se 10 tak ke numbers print karo using for loop.

for i in range(1, 11):
    print(i)

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Q3. Ek number input lo. Agar vo 0 se chhota hai to "Negative", 0 hai to "Zero", aur agar 0 se bada hai to "Positive" print karo.

num = int(input("Enter number: "))
if num < 0:
    print("Negative")
elif num == 0:
    print("Zero")
else:
    print("Positive")

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Q4. Ek number input lo. Uska table print karo (jaise 5 ka table).

num = int(input("Enter number: "))
for i in range(1, 11):
    print(num, "x", i, "=", num*i)

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Q5. 1 se 100 ke beech ke sabhi even numbers print karo.

for i in range(1, 101):
    if i % 2 == 0:
        print(i)

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Q6. Ek student ke marks input lo. Pass ho to "Pass", otherwise "Fail" print karo (passing marks = 33).

marks = int(input("Enter marks: "))
if marks >= 33:
    print("Pass")
else:
    print("Fail")

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Q7. Ek list [1,2,3,4,5] ke sabhi numbers ko 2 se multiply karke print karo.

numbers = [1, 2, 3, 4, 5]
for num in numbers:
    print(num * 2)

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📘 Summary Table

Concept	Syntax	Use
if	if condition:	Jab ek condition true ho
if-else	if...else:	Jab do possibilities ho (true/false)
if-elif-else	if...elif...else:	Jab multiple conditions ho
for loop	for i in range(start, end):	Jab repeat karna ho

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