Python Program to Check Prime Number - Complete Guide | Python Tutorial

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[@ihaveitinme638]

def prime_number(n): if n==1: b=print(n,":not prime") return b if n>1: for i in range(2,n): if n%i==0: c=print(n,":not prime") return c break else: print(n,":prime number") n=int(input("enter number:")) prime_number(n)

[@BMWCLASSICS_]

bro i think in last we also have to put break when i run it on my pc it shows 2 output

[@AbCd-n3j]

Bero 2 is also a prime no. Thia code ia not working for 2

[@Hindustani-dl8lp]

Wow bro

[@sakshimourya5418]

you deserve more likes, cleared my concept completely.

[@GoGetSP]

num=int(input("Enter a num to check whether prime or not:")) if num == 1: print(num,"is not a prime number.") elif num == 2: print(num,"is the smallest prime number.") else: for i in range(2,num): if num % i ==0: print(num," is not a prime number.") else: print(num,"is a prime number.") break

[@VARADHARLIKAR-ul1oc]

def prime_number(n): if n==1: b=print(n,"is not an prime number") return b if n>1: for i in range(2,n): if n%i==0: c=print(n,"is not an prime number") return c break else: print(n,"is prime number") n=int(input("enter the number to check :")) prime_number(n)

[@Raj-v8j5u]

Thanks mam. Even telusko hadnt explained this topic this superb. It helped me who is from no CS background.

[@sushantchougale6818]

Thank you very much 😊 ☺️

[@gauravpandey9739]

You are amazing mam❤

[@itsonlytech8251]

Nice Information

[@Anubhav_Sh_]

very helpful playlist.

[@comingsoon..4258]

computer science students attendance here

[@Bunty759]

Present sir

[@PavitraShukla205]

Your loop checks divisors up to num - 1. While this works, it is not efficient for larger numbers. You only need to check divisors up to the square root of the number (int(num**0.5) + 1). This is because if a number n has a factor larger than its square root, it must also have a smaller factor below the square root.

[@niraj_cn]

Nice video

[@00__mdasif]

We wanna deep sir python videos please upload plz....

[@Naresh-Bhaydiya-Programmer]

Grateful

[@tabariqawabullah0626]

Great video. But This code is saying 9,15,21... are prime numbers but they are not. Any idea why?

[@madiripadma3877]

Prime number means the number divisible by 1 and itself.for eg : 5 5 is divisible by 1 and 5 only so it is prime number.

[@AdityaThakur-cq1ov]

I think something wrong with this code.... it's say 49 is prime .....kese......

[@karthikchinna3621]

You need to add break statment

[@anud1917]

# 11:program to check if any given number is a prime number. num = int(input("enter the number")) if num

[@sapisgreat]

doesnt work with 0

[@asishkumarpatro5903]

​@@sapisgreatwill work bhai

[@sapisgreat]

@@asishkumarpatro5903 didnt for me

[@I.agri.]

@@sapisgreat that's because 0 is neither a prime nor a composite.

[@asifcreative6436]

Not working for 2

[@oxivrushab2573]

num=float(input(" enter the number ")) if(num%2==0)or(num%3==0)or(num%4==0)or(num%5==0)or(num%6==0)or(num%7==0)or(num%8==0)or(num%9==0)or(num%11==0): print( " number is not prime") else: print(" the numver is prime")

[@Mr.Regaltos]

it will say 13 is not prime wrong

[@asishkumarpatro5903]

Bhai infinite prime h tu aise nahi kar sakta

[@kabeersharma6403]

Thanku Thanku Thanku Thanku

[@ronak-myself]

Sb samajh agya

[@gtdforum]

Is there a need for a for loop in this example

[@adityatorane1234]

num=int(input("enter num:-")) if(num%2): print("it is prime number") else: print("it is not a prime number") this code is also working to check prime number

[@Arun_Pundhir007]

Does it work for 2??

[@sohebsk2196]

this code does not hold for some numbers,,,here isthe correct version: n=int(input("ENTER A NUMBER=")) if n

[@asishkumarpatro5903]

2 is prime brother

[@Zapoodle8]

@@asishkumarpatro5903 yes...

[@khushiv2003]

n=int(input()) if n==1: print('n is not prime') elif n==2: print('n is prime') else: for i in range(2,n): if n%i==0: print('n is not prime') break else: print('n is prime')

[@rushijadhav6903]

What about 99,15,21,25 they are not prime number

[@Vivekyaadavvlogs]

❤

[@prittamsingh4453]

mam which software you are using

[@prinjaymandani7419]

pycharm

[@AbCd-n3j]

2 is also a prime number and this code wont workjng on 2

[@abhijeetsinghyadav8988]

n= int(input("Enter any number: ")) if (n%n==0) and (n%2!=0) and (n>1): print("Given number is a prime ") else: print("No is not a prime ")

[@akashrai5253]

This same condition is apply to many numbers like 15 when it is divided by 2 it will not return 0 but it is not a prime number, so this condition will not work even mam's condition is also not working.

[@statusvideo2701]

Which platform(application) maam is using to run python code ... Please someone reply...

[@shubham_gaming-i2v]

pi charm

[@manjari400]

This code is not working appropriately for 2 and the odd numbers that are non prime number like 15,21,9 etc.

[@AshishVerma13yq]

Same doubt

[@Staredits006]

Same

[@badalmishra7395]

It is working fine. I think the problem you got is with "else" . You need to shift it as she said backwards

[@asishkumarpatro5903]

​@@badalmishra7395but shouldn't if and else statements be in the same indentation?

[@badalmishra7395]

@@asishkumarpatro5903 yes correct. But in this case if you use the same indentation as "if" in the for loop, it will throw "it is a prime number " multiple time , to break that loop for the output printed once, we need to get that else out of that for loop indentation or use the same indentation used for "for loop" statement. Secondly else should be the same indentation as "if" -True , but , here we have 3 ifs', and the code determines what should be the indentation of else. That's how loop function works

[@bgmiviralshort]

Good

[@itzmasum1079]

With this code please try input "2"

[@Aditya_Deshmukh]

x =int(input("Enter Your Number Please: ")) if x == 2: print("A Prime Number.") else: for i in range(2,x): if x % i == 0: print("Not a Prime Number.") break else: print("A Prime Number.")

[@raosajid6578]

9 is does not satisfy your code if user enter 9 then it will give us it is prime but it is not

[@rohitraj7914]

9 jb enter krenge to num=9 ho jayega to loop 2-8 tk hi chlega. So condition is satisfying for 9 also.

[@asishkumarpatro5903]

​@@rohitraj7914no brother 9 divisible by 3 so it doesn't work

[@oxivrushab2573]

Can we use only in if condition using or like number which divides by 2,3,4,5,7,6,8,9,11 are not prime else are prime my work effectively

[@impavel323]

a= ("Thank You Mam") Print(a)

[@cnadegameplay8031]

hey, check 43 as input.

[@gamingstudyff9525]

Hello sir I am a school student . Sir mai athichal hacking sikhna chahta hu plz mere ko batai ki Whete to star

[@AdityaThakur-cq1ov]

Abhi se phle where ki spelling thik kro fir agge dekhte h

[@sahildash7222]

num=13 fcount=0 for f in range(1,num+1): if(num%f==0): fcount=fcount=1 if(fcount==0): print('It is a prime number') else: print('not a prime number')

[@rameezraja2489]

Simple program ko itna complex kyu bana Diya aapne ek hi condition lagega if num%==0 then print non prime number then else num%==1 then print....... whatever you want to print

[@tcimert]

Another metho num = int(input("Enter a number ")) count = 0 if num>1: for i in range(1,num+1): if (num%i) == 0: count =count+1 if count == 2: print(num,"is a prime number") else: print(num,"is not a prime number")

[@asishkumarpatro5903]

Won't work 1 se sabka remainder 0 aayega

[@wannabe_gamer1230]

How about 2?

[@rishiraj2548]

print("Prime Number Check") num = int(input("Enter a number to check: ")) status = "prime" if num

[@Aditya_Deshmukh]

x =int(input("Enter Your Number Please: ")) if x == 2: print("A Prime Number.") else: for i in range(2,x): if x % i == 0: print("Not a Prime Number.") break else: print("A Prime Number.")

[@m.abdullahm.abdullah5000]

i understand prime is difficult in python

[@bobbyrajgorai695]

we can use this also; x=float(input('enter the year')) if (x+1)/2%2==0 : print ( ' the no. is prime') else: print (' the no. is not prime')

[@oxivrushab2573]

Not effective bro👍🏻

[@oxivrushab2573]

For 27

[@ShubhamSharma-od6tf]

Wrong code ❌ , as number is only being checked by dividing it by 2 .

[@tcimert]

num = int(input("Enter a number ")) if num < 2: print("Enter a number") elif num == 2: print(" 2 is a prime number") else: for i in range(2,num): if num%i ==0: print(num,"is not a prime number") break else: print(num,"is a prime number")

[@shubham_gaming-i2v]

@turyachaitanya if num < 2: print("Enter a number") elif num == 2: print(" 2 is a prime number") ye vala part ka use kya tha jab 2 se num tak spicify kar rahe hai tu

[@tcimert]

@@shubham_gaming-i2v 2%2 is 0, it will say not prime, but 2 is prime. So a line is written for 2.

[@dhaHu]

People starting in English and later changing their language 🙂but y

[@saritashukla123]

This code is not right.

[@VineelDikkala]

Why bro??

[@GigaChad999max]

@@VineelDikkala because 93 is not a prime number but this code shows it is a prime number

[@premgautam4957]

Please help me sir

[@sunnyyadav1298]

Didi nhi ho paya tumse rehne do

[@DataEngineer586]

n= int(input("Enter any number: ")) if (n%n==0 and n%2!=0 and n>1): print("Given number is a prime ") else: print("No is not a prime ") # please let me know if this method is wrong of writing code

[@ManishKumar-rd2iy]

Your code is wrong bro

[@swamantakmajumder4876]

a=int(input()) c=0 for i in range(1,a+1): if a%i==0: c=c+1 if(c==2): print("Prime number") else: print("Not prime")

[@Lotus_TheGirlish]

I did this...but this is nt working 😭annnnnn

[@sumaiya_730]

@@Lotus_TheGirlish it is working bro lol

[@Lotus_TheGirlish]

@@sumaiya_730 ok

[@hrishabhbramhe1697]

x = 4 if x ==1: print('not a prime') elif x ==2: print('prime') elif x>2: for i in range(2,x): if x%i == 0: print('not prime') break else: print('prime') break

[@ShubhamSharma-od6tf]

It's wrong, try 17

[@shubham_gaming-i2v]

num=int (input("enter the number")) if num==1: print("not prime") for a in range(2,num): if num%a==0: print("it not a prime number") break else: print("prime number")

[@SummiyaDiyar]

here you miss another if condition