DEV Community: kishan singh

Two Easiest way to reverse the string in python👍🤪

kishan singh — Fri, 04 Feb 2022 04:30:38 +0000

1)USING FOR LOOP❤️

def reverse(string):
rev_string=""
for i in string:

    rev_string= i+rev_string
print("reversed string:",rev_string)

string="kishan"
reverse(string)

output:

2) USING RECURSION🚇

def reverse(s):
if len(s) == 0:
return s
else:
return reverse(s[1:]) + s[0]

s = "hello brain"

print ("The original string is : ",end="")
print (s)

print ("The reversed string(using recursion) is : ",end="")
print (reverse(s)

output:

Factorial in python using recursion and for loop

kishan singh — Fri, 04 Feb 2022 04:15:49 +0000

1) #USING FOR LoOp 😍😍

n=int(input("enter the number:"))
result=1

for i in range(n,0,-1):
result=result*i

print(result)

output:

2)# using recursion 😀😁
def fact(n):
if n==0:
return 1
else:
return n*fact(n-1)

print(fact(5))

output:

Easiest Alphabet pyramid using python😀

kishan singh — Thu, 03 Feb 2022 03:02:18 +0000

1) ord() function return the unicode from a given character

n=int(input("enter the number"))
k=ord("A")
for i in range(n):
for j in range(i+1):
print(chr(k),end=" ")
k=k+1
print()

output:

2)
def pattern(n):
num=65
for i in range(0,n):
# print(i)
for j in range(0,i+1):
ch=chr(num)
print(ch,end='')
num=num+1
print("\r")
n=5
pattern(n)

output:

TYPES OF PYRAMID IN PYTHON

kishan singh — Wed, 02 Feb 2022 15:40:28 +0000

1) n=int(input("enter the number"))
for i in range(n):
for j in range(i+1):
print("*",end=" ")
print()

OUTPUT:

2) n= 6 #int(input("enter the number"))
for i in range(n):
for j in range(n-i-1):
print(" ",end=" ")
for j in range(1,i+1):
print(j,end=" ")
print()
OUTPUT:

3)n= 6 #int(input("enter the number"))
for i in range(n):
for j in range(n-i-1):
print(".",end=" ")
for j in range(1,i+1):
print(j, end=" ")
print()

OUTPUT: