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For loop program in python - Bharosewale
Posted By Naveen Singh on 18 Apr 2023
python-program
For loop program in python
1) Write a python program to display the first 10 natural numbers.
for i in range(1,11):
print(i,end=” “)
Output-:
1 2 3 4 5 6 7 8 9 10
2) Write a python program to calculate the sum of the first 10 natural numbers.
sum = 0
for i in range(1,11):
sum = sum+i
print("sum of first ten natural numbers:", sum)
Output-:
55
3) Write a python program to display n terms of natural numbers and their sum.
sum = 0
n = int(input("Enter number of terms:"))
for i in range(1,n+1):
print(i, end=" ")
sum = sum+i
print("sum:",sum)
Output-:
Enter number of terms: 6
1 2 3 4 5 6
sum: 21
4) Write a python program to read 10 numbers from keyboard and find their sum and average.
sum=0
for i in range(1,11):
sum = sum+i
avg = sum/10
print("sum:", sum)
print("average:", avg)
Output-:
sum: 55
average: 5.5
5) Write a python program to display the cube of the number upto given an integer.
num = int(input("Enter number of terms:"))
for i in range(1,num+1):
cube = i**3
print("cube of",i,"is",cube)
Output-:
cube of 1 is 1
cube of 2 is 8
cube of 3 is 27
cube of 4 is 64
cube of 5 is 125
6) write a python program to display the multiplication table of an given integer.
a = int(input("Enter any number:"))
for i in range(1,11):
table= a*i
print(a,"x",i,"=",table)
Output-:
Enter any number: 5
5x1=5
5x2=10
5x3=15
5x4=20
5x5=25
5x6=30
5x7=35
5x8=40
5x9=45
5x10=50
7) python program to display the multiplier table vertically from 1 to n.
n = int(input("Enter number of terms:"))
for i in range(1,n+1):
print()
for j in range(1,11):
table = i*j
print(i,"x",j,"=",table)
Output-:
Enter number of terms:4
1 x 1 = 1
1 x 2 = 2
1 x 3 = 3
1 x 4 = 4
1 x 5 = 5
1 x 6 = 6
1 x 7 = 7
1 x 8 = 8
1 x 9 = 9
1 x 10 = 10
2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
2 x 10 = 20
3 x 1 = 3
3 x 2 = 6
3 x 3 = 9
3 x 4 = 12
3 x 5 = 15
3 x 6 = 18
3 x 7 = 21
3 x 8 = 24
3 x 9 = 27
3 x 10 = 30
4 x 1 = 4
4 x 2 = 8
4 x 3 = 12
4 x 4 = 16
4 x 5 = 20
4 x 6 = 24
4 x 7 = 28
4 x 8 = 32
4 x 9 = 36
4 x 10 = 40
8) Write a python program to display the n terms of odd natural numbers and their sum.
n = int(input("Enter number of terms:"))
sum=0
for i in range(1,n+1):
if(i%2!=0):
print(i,end=" ")
sum=sum+i
print("sum of odd natural numbers is:",sum)
Output-:
Enter number of terms: 10
1 3 5 7 9
sum of odd natural numbers is: 25
14) Write a python program to make such a pattern as a pyramid with an asterisk.
*
* *
* * *
* * * *
n = int(input("Enter number of rows:"))
for i in range(1, n+1):
for j in range(n,i,-1):
print(" ",end=" ")
for k in range(1,i+1):
print("*"," ",end=" ")
print()
Output-:
Enter number of rows: 4
*
* *
* * *
* * * *
15) Write a python program to calculate the factorial of a given number.
x =int(input("Enter number:"))
for i in range(1,x+1):
fact = fact * i
print("factorial of a given number is:", fact)
Output-:
Enter number: 5
factorial of a given number is: 120
16) Write a python program to display the sum of n terms of even natural numbers.
n = int(input("Enter number of terms:"))
for i in range(1, n+1):
sum = sum+2*i
print("sum of series:", sum)
Output-:
Enter number of terms: 5
sum of series: 30
17) Write a python program to make such a pattern like a pyramid with a number which will repeat the number in the same row.
1
2 2
3 3 3
4 4 4 4
n = int(input("Enter number of terms:"))
for i in range(1,n+1):
for j in range(n,i,-1):
print(" ",end=" ")
for k in range(1,i+1):
print(i," ",end=" ")
print()
Output-:
Enter number of terms:4
1
2 2
3 3 3
4 4 4 4
18) Write a python program to find the sum of the series [ 1-X^2/2!+X^4/4!- .........].
n = int(input("Enter number of terms:"))
x = int(input("Enter any number:"))
sq = 1
sum = 0
for i in range(1,n+1):
fact = 1
for j in range(1,2*i+1):
fact = fact * j
sq = (-1)*i * x*(2*i)
sum += sq/fact
print("sum of series:", sum)
Output-:
Enter number of terms: 5
Enter any number: 2
sum of series: -0.416155
19) Write a python program to display the n terms of a harmonic series and their sum.
1 + 1/2 + 1/3 + 1/4 + 1/5 ... 1/n terms
sum = 0
n = int(input("Enter number of terms:"))
for i in range(1,n+1):
sum += 1/i
print("1/",i,"+",end=" ")
print()
print("sum of series:", sum)
Output-:
Enter number of terms: 5
1/1 + 1/2 + 1/3 + 1/4 + 1/5+
sum of series: 2.2833333
20) Write a python program to display the pattern as a pyramid using asterisks, with each row containing an odd number of asterisks. Go to the editor
*
* * *
* * * * *
n = int(input(" Enter number of terms:"))
for i in range(1, n+1):
for j in range(n+1,i,-1):
print(" ",end= " ")
for k in range(1,i+1):
if(i%2!=0):
print("*"," ",end=" ")
print()
Output-:
Enter number of terms:5
*
* * *
* * * * *
21) Write a python program to display the sum of the series [ 9 + 99 + 999 + 9999 ...].
n = int(input("Enter number of terms:"))
sum=0
total =0
for i in range(1,n+1):
sum = sum*10+9
total = total + sum
print("sum of series:", total)
Output-:
Enter number of terms: 5
sum of series: 111105
22. Write a python program to print Floyd's Triangle. Go to the editor
1
01
101
0101
10101
n = int(input("Enter number of rows:"))
for i in range(1,n+1):
if(i%2==0):
x = 0
else:
x = 1
for j in range(1,i+1):
print(x,end=" ")
if(x==0):
x = 1
else:
x = 0
print()
Output-:
Enter number of rows: 5
1
01
101
0101
10101
24) Write a python program to find the sum of the series [x - x^3 + x^5 + ......].
n = int(input ("Enter number of terms:"))
x = int(input("enter any value:"))
sq= 1
sum = x
m=-1
print("values of series are:")
print(x)
for i in range(1, n):
sq = 2*i+1
val = x**sq
new = val*m
print(new)
sum = sum +new
m=m*(-1)
print("sum of series:",sum)
Output-:
Enter number of terms:5
Enter any number: 2
value of series are:
2
-8
32
-128
512
sum of series: 410
25. Write a python program that displays the n terms of square natural numbers and their sum.
1 4 9 16 ... n terms
n = int(input("Enter number of terms:"))
sum=0
print("square natural numbers are :")
for i in range(1,n+1):
sq = i**2
sum = sum+sq
print(sq,end= " ")
print()
print("sum of square natural numbers are:",sum)
Output-:
Enter number of terms: 5
Square natural numbers are: 1,4,9,16,25
sum of square natural numbers are: 55
26. Write a python program to find the sum of the series 1 +11 + 111 + 1111 + .. n terms.
n = int(input("Enter number of terms:"))
sum = 0
total = 0
for i in range(1,n+1):
sum = sum*10+1
total = total + sum
print(sum,"+",end = " ")
print("sum of series:", total)
Output-:
Enter number of terms:5
1 + 11 + 111 + 1111 + 11111 +
sum of series: 12345
27. Write a python program to check whether a given number is a 'Perfect' number or not.
a = int(input("Enter any number:"))
sum=0
for i in range(1,a):
if(a%i==0):
sum=sum+i
print(i)
if(sum==a):
print("perfect number:",sum)
else:
print("not a perfect number")
Output-:
Enter any number:28
1
2
4
7
14
perfect number:28
28) Write a python program to find the 'Perfect' numbers within a given number of ranges.
n = int(input(“Enter range:”))
for i in range(1,n+1):
sum= 0
for j in range(1,i):
if( i%j==0):
sum=sum+j
if( sum==i):
print(“perfect number”,i)
Output-:
Enter range: 50
Perfect number:6
Perfect number:28
29) Write a python program to check whether a given number is an Armstrong number or not.
num = int(input(“Enter any number:”))
temp = num
sum=0
for i in range(1,temp+1):
rem = temp%10
sum += rem**3
temp //=10
if( sum == num):
print(“Armstrong number”)
else:
print(“not a Armstrong number”)
Output-:
Enter any number: 153
Armstrong number
30) Write a python program to find the Armstrong number for a given range of number.
n = int(input("Enter range:"))
for i in range(1,n+1):
temp = i
sum = 0
for j in range(1,i+1):
rem = temp%10
sum += rem**3
temp//=10
if(sum == i):
print("Armstrong number",i)
Output-:
Enter range: 1000
Armstrong number 1
Armstrong number 153
Armstrong number 370
Armstrong number 371
Armstrong number 407
31) Write a python program to display a pattern like a diamond.
*
***
*****
*******
*********
*******
*****
***
*
for i in range(1,5):
for j in range(4-i):
print(end=" ")
for j in range(1,i*2):
print("*",end=" ")
print()
for i in range(3,0,-1):
for j in range(4-i):
print(end=" ")
for j in range(1,i*2):
print("*",end=" ")
print()
Output-:
*
* * *
* * * * *
* * * * * * *
* * * * *
* * *
*
32. Write a python program to determine whether a given number is prime or not.
num = int(input("Enter any number:"))
if(num%1==0 and num%num==0):
print("prime number")
else:
print("not a prime number")
Output-:
Enter any number: 13
prime number
33) Write a python program to display Pascal's triangle.
n=int(input("Enter rows:"))
c=1
for i in range(1,n+1):
for j in range(1,(n-i)+1):
print(" ",end=" ")
for k in range(0,i):
if k==0 or i==0:
c=1
else:
c=c*(i-k)//k
print(c," ",end=" ")
print()
Output-:
Enter rows: 5
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
34) Write a python program to find the prime numbers within a range of numbers.
n= int(input("Enter range:"))
for i in range(1,n+1):
sum = 0
for j in range(2,i):
if(i%j==0):
sum=1
break
if(sum==0):
print(i,end=" ")
Output-:
Enter range:20
1 2 3 5 7 11 13 17 19
35) Write a python program to display the first n terms of the Fibonacci series.
Fibonacci series 0 1 2 3 5 8 13 .....
n = int(input("Enter number of terms:"))
x=0
y=1
print(x, end=" ")
print(y, end=" ")
for i in range(1,n+1):
z = x + y
print(z, end=" ")
x = y
y = z
Output-:
Enter number of terms: 5
0 1 1 2 3 5 8
36) Write a python program to display a such a pattern for n rows using a number that starts with 1 and each row will have a 1 as the first and last number.
1
121
12321
n = int(input("Enter number of terms:"))
for i in range(1,n+1):
for j in range(1,(n-i)+1):
print(" ",end=" ")
for j in range(1,i+1):
print(j,end=" ")
for j in range(i-1,0,-1):
print(j,end=" ")
print()
Output-:
Enter number of terms:5
1
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
37) Write a program in C to display the number in reverse order.
import math
num = int(input("Enter any number for reversing:"))
sum = 0
l=int(math.log10(num))+1
for i in range(1,l+1):
r = num%10
sum = sum*10+r
num = num//10
print(sum)
Output-:
Enter any number for reversing:12345
54321
38) Write a C program to check whether a number is a palindrome or not.
import math
temp = int(input("Enter number:"))
sum = 0
num = temp
l=int(math.log10(num))+1
for i in range(1,l+1):
r = num%10
sum = sum*10+r
num = num//10
if(sum==temp):
print("palindrome number:",sum)
else:
print("not a palindrome number")
Output-:
Enter number:121
palindrome number: 121
39) Write a program in C to find the number and sum of all integers between 100 and 200 which are divisible by 9.
start = int(input("Enter starting number:"))
end = int(input("Enter ending number:"))
sum=0
for i in range(start,end+1):
if(i%9==0):
print(i,end=" ")
sum = sum+i
print()
print("sum of numbers:",sum)
Output-:
Enter starting number:100
Enter ending number:200
108 117 126 135 144 153 162 171 180 189 198
sum of numbers: 1683
40. Write a C program to display the pyramid pattern using the alphabet.
A
A B A
A B C B A
A B C D C B A
for i in range(65,70+1):
for sp in range(70,i,-1):
print(" ",end=" ")
for j in range(65,i+1):
print(chr(j),end=" ")
for k in range(j-1,64,-1):
print(chr(k),end=" ")
print()
Output-:
A
A B A
A B C B A
A B C D C B A
41. Write a python program to convert a decimal number into binary without using an array.
bn = 0
a=1
n = int(input("Enter decimal value:"))
for i in range(1,n+1):
dec = n%2
bn = bn+dec*a
a = a*10
n = int(n/2)
print("Binary number is:",bn)
Output-:
Enter decimal value:10
Binary number is: 1010
Priyanshu
Easy program to understand and very helpful
26/04/2023