Practice Questions of Loops in Python — Test 1
Q1. Write the output of the following: 1. for i in "Myblog": print (i, '?')Ans. M ? y ? b ? l ? o ? g ?2. for i in range(5): print(i)Ans. 0 1 2 3 43. for i in range(10,15): print(i)Ans. 10 11 12 13 14Q2. Write a program to print first 10 natural number.Ans. for i in range(1,11): print(i)Q3. Write a program to print first 10 even numbers.Ans. for i in range(2,22,2): print(i)Q4. Write a program to print first 10 odd numbers.Ans. for i in range(1,21,2): print(i)Q5. Write a program to print first 10 even numbers in reverse order.Ans. for i in range(20,0,-2): print(i)Q6. Write a program to print table of a number accepted from user.Ans. num = int(input("Enter any number") for i in range(1,11): print(num*i)Q7. Write a program to display product of the digits of a number accepted from the user.Ans. num=int(input("Enter any number")) p=1 while(num): r=num%10 p=p*r num=num//10 print("Product of digits is",p)Q8. Write a program to find the factorial of a number.Ans. num=int(input("Enter any number")) f=1 for i in range(1,num+1): f=f*i print("Factorial is",f)Q9. Write a program to find the sum of the digits of a number accepted from userAns. num=int(input("Enter any number")) s=0 while(num): r=num%10 s=s+r num=num//10 print("Sum of digits is",s)Q10. Write a program to check whether a number is prime or not.Ans. num=int(input("Enter any number")) f=0 if num==1 or num==0: f=1 for i in range(2,num): if num%i==0: f=1 if f==1: print("Number is not prime") else: print("Number is prime")
Practice Questions of Loops in Python — Test 2
Q1. Write the output of the following
1. for i in (1,10):
print(i)
Ans
1
10
2. for i in (5,9):
print(i)
Ans.
5
9
3. for i in range(2,7):
print(i)
Ans.
2
3
4
5
6
4. for i in "csiplearninghub":
print(i)
Ans.
c
s
i
p
l
e
a
r
n
i
n
g
h
u
b
5. for i in "python":
print(i, end=' ')
Ans.
p y t h o n
6. for i in "python":
print(i, end=='?')
Ans.
p?y?t?h?o?n?
7. for i in "python":
print(i, '?$')
Ans.
p?$y?$t?$h?$o?$n?$
8. for i in (1,2,3,4):
print(i)
Ans.
1
2
3
4
9. for i in (3,4,7):
print(i)
Ans.
3
4
7
10. for i in range(2,10,2):
print(i)
Ans
2
4
6
8
Practice Questions of Loops in Python — Test 3
Q1. Write the output of the following code :
x=5
while(x<15):
print(x**2)
x+=3
25
64
121
196
 a=7
b=5
while(a<9):
print(a+b)
a+=1
12
13
b=5
while(b<9):
print("H")
b+=1
H
H
H
H
b=15
while(b>9):
print("Hello")
b=b-2
Hello
Hello
HelloÂ
x=15
while(x==15):
print("Hello")
x=x-3
Â
x = "123"
for i in x:
print("a")a
a
aÂ
i=9
while True:
if i%3==0:
break
print("A")
Loop will not executeÂ
a=6
while(a<=10):
print("a")
a+=1 a
a
a
a
aÂ
i=0
while i<3:
print(i)
i=i+1
else:
print(7)0
1
2
7Â
i=0
while i<3:
print(i)
i=i+1
print(0)0
0
1
0
2
0Â
i=2
for x in range(i):
i+=1
print(i)
print(i)3
3
4
4i=2
for x in range(i):
x+=1
print(x)
print(x)1
2
2Â
i=2
for x in range(i):
x+=1
print(x)
print("x")1
x
2
xÂ
i=100
while i<57:
print(i)
i+=5
Loop will run infinite times
Practice Questions of Loops in Python — Test 4
Q1. Write program to print the following pattern.
a)
1
1 2
1 2 3
1 2 3 4
b)
* * * *
* * *
* *
*
Ans a)
for i in range(1,5):
for j in range(1,i+1):
print(j,end=" ")
print()
Ans b)
for i in range(4,0,-1):
for j in range(i):
print("*",end=" ")
print()
Q2. Accept 10 numbers from the user and display their average.
Ans.
s=0
for i in range(10):
n=int(input("Enter number"))
s=s+n
print("Average of 10 numbers is ",s/10)
Q3. Write a program to print all prime numbers  that fall between two numbers including both(accept two numbers from the user)
Ans.
def primn(num):
f=0
if num==1 or num==0:
f=1
for i in range(2,num):
if num%i==0:
f=1
if f==1:
return 'n'
else:
return 'y'
num1=int(input("Enter first number"))
num2=int(input("Enter Second number"))
if num1>num2:
for i in range(num2,num1+1):
r=primn(i)
if r=='y':
print(i)
else:
for i in range(num1,num2+1):
r=primn(i)
if r=='y':
print(i)
Q4. Write a program to display sum of odd numbers and even numbers that fall between 12 and 37(including both numbers)
Ans:
so=0
se=0
for i in range(12,38):
if i % 2==0:
se=se+i
else:
so=so+i
print("Sum of all even numbers is ",se)
print("Sum of all odd numbers is ",so)Q5. Write a program to display all the numbers which are divisible by 11 but not by 2 between 100 and 500.
Ans.
for i in range(100,500):
if i%11==0 and i%2!=0:
print(i)Q6. How many times the following loop execute?
c = 0
while c < 20:
     c += 2Q7. Write the output of the following.
c = -9
while c < 20:
c += 3
 print(c)
Ans.
-6
-3
0
3
6
9
12
15
18
21Q8. Write a program to print numbers from 1 to 20 except multiple of 2 & 3.
Ans.
for i in range(1,21):
if i%2!=0 and i%3!=0:
print(i)Â
Q9. Write a program to print table of a number(accepted from user) in the following format.Â
    Like : input number is 7, so expected output is
    7 * 1 = 7
    7 * 2 = 14 and so on
Ans.
num = int(input("Enter any number"))
for i in range(1,11):
print(num,"*",i,"=",num*i)Q10. Write a program that keep on accepting number from the user until user enters Zero. Display the sum and average of all the numbers.
Ans.
num=1
i=-1
s=0
while(num!=0):
num=int(input("Enter any number"))
s=s+num
i=i+1
print("Average of numbers entered by you is ",s/i)Practice Questions of Loops in Python — Test 5
Q1. Write a program to print the following pattern
5 5 5 5 5
4 4 4 4
3 3 3
2 2
1
Ans.
for i in range(5,0,-1):
 for j in range(1,i+1):
   print(i,end=" ")
 print()Q2. Find errors in the following code:
a = int(“Enter any number”)
for i in Range[2,6]
   if a=i
     print(“A”)
   else
     print(“B”)
Ans.
a = int(input(“Enter any number”))
for i in range(2,6):
   if a==i:
     print(“A”)
   else:
     print(“B”)
Q3. Write a program to accept decimal number and display its binary number.
Ans.
num=int(input("Enter any number"))
l=[]
while(num):
r=num%2
l.append(r)
num=num//2
for i in range(len(l)-1,-1,-1):
print(l[i],end=" ")Q4. Accept a number and check whether it is palindrome or not.
num=int(input("Enter any number"))
ornum=num
rn=0
while(num):
   r=num%10
   rn=rn*10+r
   num=num//10
if ornum==rn:
   print("Number is Palindrome")
else:
   print("Number is not a Palindrome")
Q5. Write a program to accept a number and check whether it is a perfect number or not.
(Perfect number is a positive integer which is equal to the sum of its divisors like divisors of 6 are 1,2,3, and
sum of divisors is also 6, so 6 is the perfect number)
Ans.
num=int(input("Enter any number"))
s=0
for i in range(1,num):
if num%i==0:
s=s+i
if num==s:
print("Number is perfect")
else:
print("Number is not perfect")Q6. Write a program to find the sum of the following series(accept values of x and n from user)
1 + x/1! + x2/2! + ……….xn/n!
Ans
import math
n=int(input("Enter number of terms"))
x=int(input("Enter the base"))
s=1.0
for i in range(1,n+1):
s=s+math.pow(x,i)/math.factorial(i)
print(s)Q7. Write a program to print the following pattern
A
B C
D E F
G H I J
K L M N O
Ans.
l=65
for i in range(1,6):
for j in range(1,i+1):
print(chr(l),end=" ")
l=l+1
print()
l=65
 Q8. Write a program to find the sum of following (Accept values of a, r, n from user)
a + ar + ar2 + ar3 + ………..arn
Q9. Write the output of the following
for x in range(10,20): Â
if (x%2==0):
   continue
   print(x)
Ans. No OutputQ10. Write a function to display prime numbers below any number accepted from the user.
Ans.
def primn(num):
f=0
if num==1 or num==0:
f=1
for i in range(2,num):
if num%i==0:
f=1
if f==1:
return 'n'
else:
return 'y'
num=int(input("Enter number"))
for i in range(num):
r=primn(i)
if r=='y':
print(i)Practice Questions of Loops in Python — Test 6
Q1. Write the output of the following.
a=5
while a>0:
  print(a)
  a=a-1
Ans.
5
4
3
2
1
Q2. for loop statement is terminated by symbol ___________
Ans. Semicolon(;)
Q3. What is the difference between break and continue statements?
Â
Ans. break statement terminates the loop as the condition matches. for example.
a=5
while a>0:
a=a-1
if a==3: #as this condition matches it terminates the loop
break
else:
print(a)
Output : 4
Continue statement is used to skip a particular condition. for example
a=5
while a>0:
a=a-1
if a==3: #as this condition matches it goes to the next condition of the loop
continue
else:
print(a)
Output :
4
2
1
0
Q4. Convert the following loop into for loop :
x = 4
while(x<=8):
  print(x*10)
  x+=2
Ans.
for x in range(4,9,2):
print(x*10)
Â
Q5. Write the output of the following:
for k in range(10,20,4):
  print(k)
Ans.
10
14
18
Q6. Find errors in the following code:
x = input(“Enter value”)
for k in range[0,20]
  if x=k
    print(x+k)
  else:
    Print(x-k)
Ans
x = input("Enter value")
for k in range(0,20):
 if x==k:
   print(x+k)
 else:
   print(x-k)
Q7. Write the output of the following:
x=3
if x>2 or x<5 and x==6:
  print(“Bye”)
else:
  print(“Thankyou”)
Q8. Write the output of the following:
x,y=2,4
if(x+y==10):
  print(“Thankyou”)
else:
  print(“Bye”)
Q9. Write the output of the following:
x=10
y=1
while x>y:
  x=x-4
  y=y+3
  print(x)
Ans.
6
2
Q10. Write the output of the following:
for x in range(3):
  for y in range(2):
    print(“Practice Questions of loops in python”)
  print()
Ans.
Practice Questions of loops in python
Practice Questions of loops in python
Practice Questions of loops in python
Practice Questions of loops in python
Practice Questions of loops in python
Practice Questions of loops in python
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Practice Questions of Loops in Python — Test 7
Q1. What do you mean by jump statement?
Q2. What is nested loop?
Q3. Write a program to print the following pattern.
1Â Â 2Â Â Â 3Â Â 4Â
1Â Â 2Â Â Â 3
1Â Â 2
1
Q4. Write a program to print the following pattern.
A
BÂ Â C
DÂ Â EÂ Â F
GÂ Â HÂ Â IÂ Â J
Q5. Write a program to print the following pattern.
AÂ Â AÂ Â AÂ Â A
AÂ Â AÂ Â AÂ Â A
AÂ Â AÂ Â AÂ Â A
AÂ Â AÂ Â AÂ Â A
Q6. Write a program to convert temperature in Fahrenheit to Celsius.
Q7. Write a program to print the factorial of a number.
Q8. Write a program to find the sum of digits of a number.
Q9. Accept two numbers from the user and display sum of even numbers between them(including both)
Q10. Write a program to reverse a number.
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Class 12 Computer Science Sample Paper 2020-2021.
Class 12 Computer Science Sample Paper Marking Scheme
Class 12 Computer Science Test Series