Useful 20+ Iterative Statement Python Program Question and Answer

    ITERATIVE STATEMENTS PROGRAMS

 

Q1. Write a program to accept an integer and print the multiplication table of that number till 10.

x=int(input('enter a number'))

for i in range(1,11):

    b=x*i

    print(x,'x',i,'=',b)

Q2. Write a program to accept an integer and display the factorial of that number. Eg: if the number is 3 then 3! is 6.

x=int(input('enter a number'))

a=1

for i in range(1,x+1):

    a=a*i

print(x,'factorial =',a)

Q3. Write a program to accept an integer and generate the divisors of that integer. Eg: If the number is 6 then its divisors are 1 2 3 6.

a=int(input('enter number'))

print('the divisors are:')

for i in range(1,a+1):

    if a%i==0:

        print(i)

Q4. Write a program to print first ‘n’ odd numbers in descending order. Eg: if number is 10, then the output is 9 7 5 3 1.

a=int(input('enter number:'))

for i in range(1,a+1):

    if i%2!=0:

        print(i)

Q5. Write a program to accept the number of terms of the Fibonacci series and print the series till that term. ie.,0 1 1 2 3 5 8 ……….

a=int(input('enter number:'))

x=0

y=1

print(x)

print(y)

for i in range(1,a+1):

    z=x+y

    x=y

    y=z

    print(z)

Q6. Write a program to find the sum of a Series 1/1! + 2/2! + 3/3! + 4/4! +…….+ n/n!

n=int(input('enter number'))

a=1

z=1

for i in range(1,n+1):

    a=a*i

    z=z+(i/a)

print('sum is:',z)

Q7. Write a program to input x and the number of terms and finds the sum of series: 1 + x^2/2 + x^3/3 + … x^n/n.

n=int(input('Enter the number of terms'))

x=int(input('Enter the value of x'))

sum=1

for i in range(2,n+1):

    sum=sum+((x**i)/i)

print('The sum of series is',sum)

Q8. Write a program to find the sum of the series a, a + d, a + 2d, a + 3d, . . . .

a=eval(input("enter first term"))

b=eval(input("enter common difference"))

c=eval(input("no. of terms"))

d=0

for i in range(1,c+1,1):

    d=d+a+(i-1)*b

print(d,"sum of the A.P.")

Q9. Write a program to print the sum of the following series. Accept the value for ‘x’ and the number of terms of the series. 1 – x² + x⁴ – x⁶ + ……………………. xⁿ.

a=eval(input("enter of terms"))

b=eval(input("enter X"))

c=0

for i in range(0,a+1,2):

    c=c+(-1)**i*b**(2*i)

print(c,"sum of the required series")

Q10. Write a program to accept the number of lines and print the following pattern. Eg: If the number of lines is 4, then the pattern should be as follows.

*

* *

* * *

* * * *

n=int(input('enter number'))

for i in range(1,n+1):

    print('*'*i)

Q11. Write a program to accept the number of lines and print the following pattern. Eg: If the number of lines is 4, then the pattern should be as follows.

A

BB

CCC

DDDD

x=int(input('ENTER NO.'))

y=64

for i in range(1,x+1):

    y=y+1

    print(chr(y)*i)

Q12. Write a program to accept the number of lines and print the following pattern. Eg: If the number of lines is 4, then the pattern should be as follows.

* * * *

* * *

**

*

x=int(input('ENTER NO.'))

for i in range(x,0,-1):

    print('*'*i)

Q13. Write a program to accept the number of lines and print the following pattern. Eg: If the number of lines is 3, then the pattern should be as follows.

A

A B

A B C

a=int(input("enter number:"))

b=64

x=''

for i in range(1,a+1):

    b=b+1

    x=x+chr(b)

    print(x)

Q14. Write a program to accept the number of lines and print the following pattern. Eg: If the number of lines is 4, then the pattern should be as follows:

1

1 2

1 2 3

1 2 3 4

Method 1

a=int(input("enter number:"))
b=48
x=''
for i in range(1,a+1):
   b=b+1
   x=x+chr(b)
   print(x)

Method 2

a=int(input("enter number:"))

for i in range(1,a+1):

    for co in range(1,i+1):

        print(co,end='')

    print("")

Q15. Write a program to accept an integer and check whether it is a prime number or not and display proper messages.

a=eval(input("enter no."))

c=0

for i in range(2,a,1):

    if a%i==0:

        c=c+1   

if c==0:

    print("prime no.")

else:

    print("not prime")

Q16. Write a program to accept an integer and check whether it is palindrome or not and display proper messages.

a=eval(input("enter number"))

b=0

d=a

f=a

c=0

while(a!=0):

    b=b+1

    a=a//10

for i in range(1,b+1,1):

    e=d%10

    c=c+e*10**(b-i)

    d=d//10

if c==f:

    print(c,"is a palindrome number")

else:

    print(c,"is not a palindrome number")

Q17. Write a program to accept an integer and check whether it is an Armstrong number or not and display proper messages.

a=eval(input("enter number"))

b=0

d=a

while(a!=0):

    c=a%10

    a=a//10

    b=b+c**3

if b==d:

    print(d,"is an armstrong number")

else:

    print(d,"is not an armstrong number")

Q18. Write a program to accept two integers and find the LCM and GCD of these numbers and display it.

a=eval(input("enter number"))

b=eval(input("enter number"))

if a>b:

    for i in range(1,a,1):

        if a%i==0 and b%i==0:

            c=i

        else:

            c=c

if a<b:

    for i in range(1,b,1):

        if a%i==0 and b%i==0:

            c=i

        else:

            c=c

print(c,"is the GCD of the above numbers")

d=a*b/c

print(d,"is the LCM of the above numbers")

Q19. Write a program to accept an integer and find the sum of digits of that number and display it.

a=eval(input("enter number"))

b=0

while(a!=0):

    c=a%10

    a=a//10

    b=b+c

print(b,"sum of the digits of the number")

Q20. Write a program to accept an integer and display the reversed integer (store the reversed number in a variable). Eg: If the number is 267 then the reversed number is 762.

a=eval(input("enter number"))

d=a

e=a

b=0

c=0

while(a!=0):

    b=b+1

    a=a//10

for i in range(1,b+1,1):

    f=d%10

    d=d//10

    c=c+f*10**(b-i)

print(c,"is the number obtined by reversing the digits")

Q21. Write a program to print the sum of negative numbers, sum of positive even numbers, sum of positive odd numbers from a list of numbers entered by the user. The list terminates when the num entered is zero.

b=0

c=0

d=0

a=1

while(a!=0):

    a=eval(input("enter number"))

    if a<0:

        b=b+a

    elif a>0:

        if a%2==0:

            c=c+a

        elif a%2==1:

            d=d+a

print(b,":sum of negative numbers")

print(c,":sum of even positive numbers")

print(d,":sum of odd positive numbers")

Q22. Write a program to print all prime numbers from 1 to ‘n’. Accept the value for ‘n’ from the user. Eg: If number is 10, then the output is 2 3 5 7

a=eval(input("enter no."))

i=0

while(i<a):

    i=i+1

    j=0

    s=0

    while(j<i):

        j=j+1

        if i%j==0:

            s=s+1

    if s==2:

        print(i,end=" ")