If the function calls itself under function block then it is called recursion. every loop process has been implemented by recursion.
we can call the same function multiple times under function.
def xyz():
xyz()
where xyz is the function that will be called under xyz() which is called recursion.
Now I am implementing another example:-
def xyz(num):
print("number ",num)
if num>10:
return 1
xyz(num+1)
xyz(1)
If we want to perform the addition of range from 1 to num then we can use this program using the recursion process.
def fun(num):
if num ==0:
return num
else:
return num+fun(num-1)
x=fun(5)
print(x)
Assignment of Recursion?
1) WAP to calculate factorial using recursion?
2) WAP to display Fibonacci series using recursion?
0 1 1 2 3 5 8 13 21 .......
3) WAP to calculate the sum of even numbers and the odd numbers of 1 to 50 using recursion?
#WAP to calculate factorial using recursion?
ردحذفdef fun(num):
if num ==1:
return num
else:
return num*fun(num-1)
x=fun(5)
print(x)
#WAP to display Fibonacci series using recursion?
ردحذفdef fun(num,i,j):
if num==0:
exit(0)
else:
k=i+j
print(k)
i=j
j=k
return fun(num-1,i,j)
fun(10,-1,1)
#WAP to calculate the sum of even numbers and the odd numbers of 1 to 50 using recursion?
ردحذفdef recursion(k,n,a,b):
if(k<=n):
if(k%2==0):
a=a+k;
else:
b=b+k;
else:
print("Even no's sum is :",a,"Odd no's sum is :",b);
return 0
return recursion(k+1,n,a,b);
k=recursion(1,50,0,0);
#WAP to display Fibonacci series using recursion?
ردحذفdef fibo(n):
if n==1:
return 0
if n==2:
return 1
return fibo(n-1)+fibo(n-2)
n=int(input("enter number"))
for i in range(1,n+1):
print(fibo(i))
#Shivam Shukla
ردحذف#1) WAP to calculate factorial using recursion?
def fact(k):
if(k==1):
return k;
else:
return k*fact(k-1)
val=fact(5)
print(val)
#Shivam Shukla
ردحذف#2) WAP to display Fibonacci series using recursion?
#0 1 1 2 3 5 8 13 21 .......
def fib(times,a,b,lst):
k=a+b
lst.append(k);
if(times==1):
return lst
return fib(times-1,b,k,lst);
times=int(input("how many number's haved input : "));
a=-1; b=+1; lst=[];
print(fib(times,a,b,lst));
#Shivam Shukla
ردحذف#3) WAP to calculate the sum of even numbers and the odd numbers of 1 to 50 using recursion?
def calc(num,even,odd):
if(num%2==0):
even+=num;
else:
odd+=num;
if(num==1):
return(even,odd);
return calc(num-1,even,odd);
num=int(input("Give's a range! yaa i means 0 to where..... : "));
even=0; odd=0;
s=calc(num,even,odd);
print(s)
print("Even number's count is :",s[0]);
print("Odd number's count is :",s[1]);
# WAP to calculate factorial using recursion?
ردحذفdef fun(fac):
if fac==1:
return fac
else:
return fac*fun(fac-1)
x=fun(5)
print(x)
#WAP to display Fibonacci series using recursion?
def fibo(n):
if n==1:
return 0
if n==2:
return 1
return (fibo(n-1)+fibo(n-2))
n=int(input("Enter the number = "))
for i in range (1,n+1):
print(fibo(i))
# WAP to find even numbers and the odd numbers using recursion?
def evenodd(n):
if n==0:
return True
if n==1:
return False
return evenodd(n-2)
n=int(input("Enter the number = "))
if evenodd(n):
print(n,"even")
else:
print(n,"odd")
#WAP to calculate the sum of even numbers and the odd numbers of 1 to 50 using recursion?
def oddeven(i,n,a,b):
if i<=n:
if i%2==0:
a=a+i
else:
b=b+i
else:
print("Even",a,"odd",b)
return 0
return oddeven(i+1,n,a,b)
i=oddeven(1,50,0,0)
def fun(num):
ردحذفif num==1:
return num
else:
return num*fun(num-1)
x=fun(8)
print(x)
#WAP to calculate factorial using recursion?
ردحذفdef fact(num):
if num==1:
return num
else:
return num*fact(num-1)
n=fact(5)
print(n)
#WAP to display Fibonacci series using recursion?
ردحذفdef fib(num,a,b):
if num==0:
return
else:
c=a+b
print(c)
a=b
b=c
return fib(num-1,a,b)
fib(15,-1,1)
#WAP to calculate the sum of even numbers and the odd numbers of 1 to 50 using recursion?
ردحذفdef even(num):
if num>0:
even(num-1)
print(2*num)
even(25)
#WAP to calculate factorial using recursion?
ردحذفdef fun(num):
if num==1:
return num
else:
return num*fun(num-1)
x=fun(4)
print(x)
#PROGRAM TO CHECK PRIME NUMBER USING RECURSION
ردحذفdef prime(n, i=2):
if n == i:
return "prime number"
elif n % i == 0:
return "Not prime"
return prime(n, i + 1)
print(prime(5))
#square cube
ردحذفdef fun(n):
print(n*n, n*n*n)
if (n):
return 1
return fun(n)
fun(5)
#PROGRAM TO CHECK PRIME NUMBER USING RECURSION
ردحذفdef prime(n, i=2):
if n == i:
return 1
elif n % i == 0:
return 0
return prime(n, i + 1)
n=int(input("Enter number"))
s=prime(n)
if s==1:
print("Prime Number")
if s==0:
print("Not prime")