Python Bangla Tutorials 27 : Series

Learning outcomes:
1) 1 + 2 + 3 + …. + n
2) 2 + 4 + 6 + …. + n (sum of even numbers from 1-n )
3) 1 + 3 + 5 + …. + n (sum of odd numbers from 1-n )
4) 4 + 8 + 12 + … + n
5) 1^2 + 2^2 + 3^2 + … + n^2
6) 2^2 + 4^2 + 6^2 + … + n^2
7) 1 + ½ + 1/3 + …. + 1/n
8) 2 x 4 x 6 x …. x n (sum of even numbers from 1-n )
9) 1 x 3 x 5 x …. x n (sum of odd numbers from 1-n )
10) 4 x 8 x 12 x … x n
11) 1^2 x 2^2 x 3^2 x … x n^2
12) 2^2 x 4^2 x 6^2 x … x n^2
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[@debasispal1581]

Sir, আমি ভরতের পশ্চিমবঙ্গ থেকে বলছি, আমি একজন মেকানিক্যাল ইন্জিনিয়ার। সম্প্রতি ভারতীয় রেলের কর্মজীবন থেকে অবসর নিয়েছি। আমি পাইথন শেখার জন্য আপনার লেকচার শোনা শুরু করেছি। এক কথায় অপূর্ব। আপনার প্রতিটি লেকচার আমি শুনছি। যেটা আমাকে পাইথন প্রোগ্রামিং শিখতে খুব সাহায্য করছে। প্রার্থনা করি ঈশ্বর আপনার মঙ্গল করুন।

[@anisul-islam]

Thanks for such valuable feedback

[@techsigmarobots]

1+1/2+1/3+.........1/n
Solution is
n=int(input("Manu please enter the Last number: "))
m=0
for x in range(1,n+1,1):
m=m+1/x
print(m)
Thank you sir.

[@mahirhasan9212]

It prints the individual numbers not the sum could you please give the code of calculating the sum?

[@MahiaSetu]

Thank you

[@techsigmarobots]

@@mahirhasan9212 it's very easy.
Tomorrow I will send you,
Are you CSE student

[@techsigmarobots]

@@MahiaSetu you are welcome.
Are you CSE student

[@ELIUSISLAM-uu4bq]

tnx brother @@techsigmarobots

[@ashrafulmomenshuvo5344]

May Allah give U Jannah!

[@anisul-islam]

Ameen

[@pavelzaman]

love you vai. u r a superman.you helping lots of student and we r learning from u.May Allah bless you always.

[@mahfuz6061]

#1+1/2+1/3+..........n
n=int(input("enter your last number:"))
sum=0
for x in range(1,n+1,1):
sum=sum+1/x
print(sum)

[@AppyAIapps]

n=int(input("enput your number :"))
fac=1
for x in range(1,n+1,1):
fac=fac*x

print("factorial number is :",fac)

[@md.anamulhasan1535]

n = int(input("enter number: "))
counter = 0
for i in range(2,n,1):
if n%i == 0:
counter = counter + 1
break
if counter == 0:
print("The number is prime")
else:
print("The number is not prime")

[@sakibhossainpolas6422]

for i in range(2,n,1):
if n%i == 0:
counter = counter + 1
break
# vai ai jaygata bujhtea partasi na

[@nurulabsarshadik5260]

Baia aktu bujai dan na plz

[@HackerBoy-hm2sr]

n= int(input("Enter Number : "))
sum =1
for x in range(1,n+1,1) :
sum =sum+(sum/x)
print(float(sum))

[@arsonbasak5390]

sir apanar prothom somosshata
n = int(input("enter the last number :"))
sum = 0
for x in range(1,n+1,2):
sum = sum+(1/x)
print(x)
print("The additional value is :",sum)

[@sadmansakib6214]

print ('Even numbers like 2, 4, 6, 8, ...n ')
input_num = int(input('last number: '))
addition = 0
for x in range (2, input_num+1, 2):
addition += x
print (addition)

[@rubelislamcse7219]

vai onek valo hosse .doa kori aro valo korete paren jeno

[@rubelislamcse7219]

very very thanks

[@mahinmia9335]

1+1/1+1/3+......................+1/n
n=int(input("Enter your number = "))
sum=1
for x in range (1,n+ 1,1):
sum=sum+1/x
print(sum)

[@enjoyyourlife500]

# x + 1/2 + 1/3 ...... +1/n
n = int (input ("Enter the last number : "))
sum = 0
for x in range (1,n+1,1) :
sum = sum + 1/x
print (sum)

[@parthosaha4170]

n=int hbe naki float hbe jehetu eita fraction series?

[@sabrinajahan8571]

@@parthosaha4170 float

[@jisanjoy_]

@@parthosaha4170 int

[@ELIUSISLAM-uu4bq]

tnx brother

[@ELIUSISLAM-uu4bq]

tnx

[@masudranahimu3783]

😍😍

[@marmonilhobi7130]

you are great

[@nurmuhammadshahin4002]

JazakAllah

[@mdshahidulbsc7301]

May Allah bless you

[@MDkaif-zr4xe]

Thank you so much sir

[@BacktoOrigin-xl1om]

Allah bless you,

[@OBIDUR7]

Thanks

[@mehmederfan9282]

Great

[@Gigachad-rr6yy]

what is the use of this program .please tell me sir .

[@mondolbd4340]

Thank You Sir

[@paradoxical5572]

# 1 + 1/2 + 1/3 + ........... + 1/n
# 1/1 + 1/2 + 1/3 + ........... + 1/n
n = int(input("Enter the last number :"))
add = 0
for x in range(1, n+1, 1):
add = add + (1/x)
print("The addition value is :", float(add))

[@khokanmallik1742]

# Factorial Program Using for loop
n = int (input("Enter the number:"))
fac = 1
for i in range(n,0,-1):
fac = fac * i
print(fac)

[@upolobdhi023]

could you please tell me why sum = 0 , then again sum = sum + x , is it like that 0 = 0 + x , when x = 1 then who can it possible 0 = 1 ? if write f = sum + x , is it ok ?

[@watchingrain1621]

n = int(input("Enter a positive integer: "))
sum = 0
for x in range(1, n+1):
sum =sum+ 1/x
print("The sum of the series is:", sum)

[@monir26396]

Solution of no.7
i = 0
count = 0
n = int(input('Enter the last number: '))
for i in range(1,n+1):
count = count + 1/i
print(count)

[@studywithroman1997]

মাশাল্লাহ

[@mdmohinuddin1917]

sir eta right naki wrong?
#2*2+4*4+6*6+...n*n
n=6
sum=0
for x in range(2,n+1,2):
print(x)
sum=sum+x*x
print(sum)
output:
56

[@mahamudurrahmanbulbul3073]

#finding prime number
n = int(input("Enter your number: "))
count = 0
if n>1:
for i in range(2, n):
if (n % i == 0):
count= count +1
break
if (count==1):
print(n,"is not a prime number")
print(i,"times",n//i,"is",n)
else:
print(n,"is a prime number.")
else:
print(n,"is not a prime number.")

[@mahamudurrahmanbulbul3073]

#finding Greatest Common Divisor(GCD) & Least Common Multiple (LCM)
n1 = int(input("Enter first number: "))
n2 = int(input("Enter second number: "))
if n1>n2:
smaller = n2
bigger = n1
else:
smaller = n1
bigger = n2
while smaller!=0:
remainder = bigger % smaller
bigger = smaller
smaller = remainder
continue
gcd = bigger
lcm = (n1*n2/gcd)
print("GCD of",n1,"&",n2,"is:",gcd)
print("LCM of",n1,"&",n2,"is:",lcm)

[@monir26396]

# Is a number prime or not...
for n in range(2,10):
for x in range(2,n):
if n % x == 0:
print(n, 'is not a prime number.')
break
else:
print(n, 'is a prime number.')

[@chash_games]

I have a question.
If its x^x
Then in nth time that will be n^n
Then
n^n != n^2
If n=5
Then 5^5

[@niloyroy6454]

স্যার অামার অাউটপুট এমন অাসতছে
Enter the last number : 5
1
3
6
10
15
এমন। For loop এর বেলায় ও এমন হয়ছে৷ এর কোনো solution দিলে খুব উপকৃত হবো sir.! 🙏

[@shahidullah233]

I have question....when i sum for the even numbers and in the range when i type (2,n+1,2) or (2,n+2,2)....and if i enter last number "20"...it results same as 110. I want to understand why this happend. Please explain Sir.

[@KamrulHasan-bm9dm]

hridoyer ontosthol theke doonobad vaiya...

[@AppyAIapps]

#1+2+3...................n
n=int(input("input your last number:"))
sum=0
for x in range(2,n+1,2):
sum= sum+x
print("sum of this serise is:",sum)

[@monayemhossain5356]

num = int(input("Enter last number : "))
series= range(1,num+1,2)
numbers = list(series)
print(f"numbers are {numbers}")
sum = 0
for x in numbers:
sum = sum + x*x
print("Sum is",sum)
Out put
Enter last number : 20
numbers are [1, 3, 5, 7, 9, 11, 13, 15, 17, 19]
Sum is 1330
Process finished with exit code 0

[@ashraf4842]

1+1/2+1/3+........+n
n=int(input("Enter the Last number: "))
sum=0
for x in range(1,n+1,1):
sum=sum+1/x
print(sum)

[@ishmamdrop1098]

for x in range(1,n+1,1): -----> step difference 1 keno dilen, vai?

[@dibbajothy5171]

yeah you are right

[@playing_game_2]

1-1/2= 0.5
and 1/2-1/3=0.16 so???

[@cybersecurity8888]

#fgfg
x=int(input("Enter the Value= "))
y=int(input("Enter the Value= "))
for i in range(max(x,y),(x*y)+1,max(x,y)):
if i%x == 0 and i%y == 0:
print("LCM is",i)
break
vaiya.....ai program a (i)-ta ki r (for i in range(max(x,y),(x*y)+1,max(x,y)):)-aitar hishab akto jodi bolen thahole balo hoto??

[@ainuddinallazad9739]

#write a program finding a number factorial
n=int(input("Enter an integer number:"))
sum=1
for i in range(1,n+1,1):
sum=sum*i
print(sum)

[@AbdullahAlMamun-ho4oq]

n=int(input("Please enter last number:"))
sum=0
for x in range(1,n+1,1):
sum=sum+x
print(sum)
Why it shows different result? Can anyone please help?

[@rashadulhaque5506]

Just shift left your last line which is 'print (sum)' ! It will be fine.

[@siamhasan6060]

1^1+2^2+3^3+...n^n
Apni j bollen (sum=sum+x*x)
Aita to wrong vaia..
(sum=sum+x**x) hobe

[@playing_game_2]

float' object cannot be interpreted as an integer
sir...1+1/2+1/3......1/n

[@mubasshirrahman8492]

Can u please desribe num 7 problem

[@nurulabsarshadik5260]

Sir onk try korlam parlam na
.kibaba prime number and losagu and gosagu bar korta hoy....aktu jodi bola ditam upokrito hotam...thank you

[@nizamuddin5423]

Write a function name “multiplyByPreviousTwo” it takes an argument. Function will print all numbers till that number. Example if you pass 7 then function will output following:
1, 2, 4, 8, 32, 256, 8192

[@sumyiachowdhury4002]

i am finding the same problem

[@ShahriyarIslam-zl7dk]

# mini calculator
first = input("Enter the first number : ")
operator = input("Enter a oparator(+,-,*,/) : ")
second = input("Enter the second number : ")
first =int(first)
second = int(second)
if operator=="+":
print(first + second)
elif operator=="-":
print(first - second)
elif operator == "*":
print(first * second)
elif operator == "/":
print(first / second)
elif operator == "%":
print(first % second)
else:
print("Operator Invalided")

[@biswarupgoswami6649]

HW:
n= int(input("Enter line number: "))
for i in range(1,n+1)
print((n-i)* ' '+ i* '*')

[@Md.Faysal.42]

assalamu alaikum sir, sum নামক function দিয়ে তো আরো সহজে করা যায় বোধ হয়।আর আপনাকে ধন্যাবাদ।

[@arsonbasak5390]

#prime number and combine number...easealy
n = int(input("Enter a number :"))
if n%n==0 and n%1==0 and n%2!=0 and n%3!=0 and n%4!=0 and n%5!=0 and n%6!=0 and n%7!=0 and n%8!=0 and n%9!=0:
print("Prime number")
else:
print("Combine number")

[@ainuddinallazad9739]

num=int(input("Enter an integer number is:"))
flag=False
if num>1: #num is greater then 1
for i in range(2,num):
if (num%2)==0:
flag=True #flag=True then it is not prime number and break
break
#Flag is True then it is not prime number
if flag:
print("It is not prime number")
else:
print("It is prime number")

[@siddharthabarmanmugdha8869]

assa last taa kivaby korbo

[@chminhaz1568]

where is my fault
n = int(input("Enter your last number: "))
sum = 0
for x in range(2,n,2) :
sum = sum + x
print(sum)

[@ShafiqulIslam-or4by]

n+1

[@shadowedmim5655]

4:21 second,
1*2+2*2+3*2.............+n*2
!?

[@mahamudurrahmanbulbul3073]

#factorial of a number
n = int(input("Enter the number: "))
fac = 1
for x in range (1, n+1, 1):
fac = fac *x
print("Factorial of "+str(n)+" is:",fac)

[@monirulislam7860]

Python mat lab plot vedio dorkar

[@nishad__9963]

#1+1/2+1/3+1/4+...1/n
n=int(input("Enter the last num:"))
sum=0
for i in range(1,n+1,1):
sum=sum+1/i
print(sum)

[@TanvirAhmed-q3o]

Thank you sir

[@mohammadabdulakher5970]

n = int(input("Enter a last number12 : "))
fac = 1
for x in range(1, n + 1, 1):
fac = fac * x
print(fac)

[@tanzimhasan4464]

Thank you sir.

[@anisul-islam]

Welcome

[@ainuddinallazad9739]

n=int(input("Enter a number is:"))
sum=0
for i in range(1,n+1,1):
sum=sum+1/i
print(sum)