Use loop within the loop.

   Elif conditions.

   Else conditions.

Source code (check odd or even):

#get input from user

n=int(input(“Enter the number:”))

#initialize the loop with condition

if(n>0):

#another loop with in the loop

if(n%2==0):

print(“Given number is even”)

#nested loop

elif(n%2!=0):

print(“Given number is odd”)

print()

Source code

(Find prime numbers in a interval):

#get the lower limit

l=int(input(“Enter the lower limit:”))

#get the upper limit

u=int(input(“Enter the upper limit:”))

#initialize the loop conditions

for i in range(l,u+1):

#another if loop within for loop

if (i>1):

#another loop

for j in range(2,i):

if (i%j==0):

break

#else statement

else:

print(i)