Python/Conditional statement while practice at master · Poorvanshi-sahu/Python · GitHub

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 #prime number
#number which divisible by one and itself except 1
   1

#number which is having exactly two factors
  1xxx 2 3 4 5 6 7 8

  prime number starts from 2
  1--1
  2--1,2
  3--1,3
  4--1,2,4
  5,-1,5
  6-1,2,3,6
  7-1,7
--->     15---->
----> 15%1  15%2  15%3  ....      15%15
    ----1----15--loop
    1500---
    1500%1---------------------1500%1500
    it will take time

#algo
# if any number is divisible up to  half of itself,its not a prime number
   ** division start from 2 becuase each number is divisible by 1
        6---->   6%2---prime
        1500-->1500%2--not prime
        7--->    7%2--7%3
        15--->  15%2 15%3--xx not prime


while test:
    --------
    -------
else:
    ------
    -------


        7/2--3.5=3


num=int(input("Enter any number:"))  # 5,12,11,15,1500
                                                #C/C++/Java

r=2
num=11
       #2<=11//2--int/int--->5
        #6<=5---true
while r<=num//2 :           #num/2==normal division .fractional---- num//2--floor  (int/int)=int
    if num%r==0: #if 11%5==0:1==0:false
        print("its not prime number")
        break  # exit from loop
    r+=1  #6

              #when and when loop stop
              #when full end---r==num//2+1
              #whe break---in between  r !=num//2+1
if  r==num//2+1:   #6==5+1
    print("its prime number")
[ no=1
while  no<=5:
    print(no)
    no+=1
else:
    print("Else part of loop")


num=int(input("Enter any number:"))  #python
r=2
while r<=num//2 :      #false----enter in else
    if num%r==0:
        print("its not prime number")
        break
    r+=1
else: # when enter in else ---> r==num//2+1
    print("Its prime number")

    #break----> outside the loop


 num=100
while num>=10:

    num-=10
    if num==20:
        continue
    print(num)
else:
    print(num)

     #break----outside the loop  ( while  --else)

                                                    HOMEWORK


print prime number between the range---> 1-100
print prime number in range where start from 1 and end is defined by user
print prime  number in range wehre start and end is defined by user

count digit
sum of digit
reserve digit

print prime number in range(1-1000)(whose digit sum is also a prime number)

 23---23--> 2+3=5(its also prime

print prime in range whose digits are also prime