Page 271 - Ai_V1.0_Class9
P. 271
S. No. Program
19 Input a number and check if the number is positive, negative or zero and display an appropriate
message
N=int(input("Enter a number: "))
if N<0:
print(N," is a -ve number")
elif N==0:
Output:
print(N," is entered")
Enter a number: 5
else:
5 is a +ve number
print(N," is a +ve number")
20 To print first 10 natural numbers
for i in range(1,11):
print(i,end="!")
Output:
1!2!3!4!5!6!7!8!9!10!
21 To print first 10 even numbers Output:
2
for i in range(1,11):
4
print(2*i)
6
8
10
12
14
16
18
20
22 To print N odd numbers
N=int(input("Enter the term : "))
Output:
for i in range(1,N+1): Enter the term : 7
print(2*i-1,end=",") 1,3,5,7,9,11,13,
23 To print sum of first 10 natural numbers
S=0
for i in range(1,11):
Output:
S+=i
The sum is 55
print("The sum is ",S)
24 Program to find the sum of all numbers stored in a list
S=0
for i in [1,2,3,4,5]:
Output:
S+=i
The sum is 15
print("The sum is ",S)
Python Practical Questions 269

