Python
Conditional Statements ( If – Else )
- Check whether the number is positive or negative
num = int(input(“Enter a number: “))
if num >= 0:
print(“The number is positive”)
else:
print(“The number is negative”)
- Check Whether the number is Odd or Even
num = int(input(“Enter a number: “))
if num % 2 == 0:
print(“Even number”)
else:
print(“Odd number”)
- Check if a person is eligible to vote
age = int(input(“Enter your age: “))
if age >= 18:
print(“You are eligible to vote”)
else:
print(“You are not eligible to vote”)
- Find the greatest of two numbers
a = int(input(“Enter first number: “))
b = int(input(“Enter second number: “))
if a > b:
print(“First number is greater”)
else:
print(“Second number is greater or equal”)
- Check if a number is divisible by 5
num = int(input(“Enter a number: “))
if num % 5 == 0:
print(“The number is divisible by 5”)
else:
print(“The number is not divisible by 5”)
- Check whether a year is a leap year
year = int(input(“Enter a year: “))
if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
print(“Leap year”)
else:
print(“Not a leap year”)
- Check if a character is a vowel or consonant
ch = input(“Enter a character: “).lower()
if ch in ‘aeiou’:
print(“Vowel”)
else:
print(“Consonant”)
- Simple grading system
marks = int(input(“Enter marks: “))
if marks >= 90:
print(“Grade A”)
elif marks >= 75:
print(“Grade B”)
elif marks >= 50:
print(“Grade C”)
else:
print(“Grade D”)
- Check if a triangle is valid
a = int(input(“Enter first side: “))
b = int(input(“Enter second side: “))
c = int(input(“Enter third side: “))
if a + b > c and b + c > a and c + a > b:
print(“Valid triangle”)
else:
print(“Invalid triangle”)
- Check whether the entered character is uppercase or lowercase
ch = input(“Enter a character: “)
if ch.isupper():
print(“Uppercase letter”)
elif ch.islower():
print(“Lowercase letter”)
else:
print(“Not an alphabet letter”)
