Python Program for Replace All 0’s With 1 In A Given Integer

Replace All 0’s With 1 In A Given Integer using Python

Here we will discuss how to Replace All 0’s With 1 In A Given Integer using Python.

The concept is simple, find the digits of the integer. Compare each digit with 0 if the digit is equal to 0 then replace it with 1. Construct the new integer with the replaced digits.

Replace all 0's with 1 in given integer

Implementation

  • We will convert the integer into string.
  • Then we will convert it into list and then we will traverse through the list.
  • Wherever we find a ‘0’ we will replace with ‘1’.

Algorithm

  • Take Input in num and initialize a variable num with with value 0
  • If num is equals to zero then update the value of num2 to 1
  • Iterate using a while loop until num is greater then 0
  • For each iteration initialize a variable rem and store unit digit of num
  • If rem equals to 0 then set rem to 1
  • Set num to num divide by 10 & num2 equals to num2*10+rem
  • Reverse and print num2
Replace all 0's with 1

Method 1

Run
num = int(input("Enter number : "))
num2 = 0

if num == 0:
    num2 = 1

while num > 0:
    rem = num % 10
    if rem == 0:
        rem = 1
    num = num//10
    num2 = num2 * 10 + rem

num = 0
while num2 > 0:
    r = num2 % 10
    num = num * 10 + r
    num2 //= 10

print("Converted number is:", num)

Method 2

Run
#taking Input
n=int(input('Enter number: '))
#converting into string
n=str(n) 
#then into the list
n=list(n)
r="" #empty string for addind it the item of list
for i in range(len(n)):
    #if we find '0' we will replace it with '1'
    if(n[i]=='0'):
        n[i]='1'
    r=r + n[i]  #creating the new integer 
del n    
print("Converted number is :",int(r))

Method 3

Run
n=int(input("Enter number: "))
s=str(n)
l=[]
for i in s:
    if(i=='0'):
        l.append('1')
    else:
        l.append(i)
ns=""
for i in l:
    ns+=i
print("Converted number is:", int(ns))

Method 4

Run
#take inputs
Val = int(input('Enter number:'))
#change type to string
Val = str(Val)
Replaced = Val.replace('0','1')
print("Converted number is:" + Replaced)

Output

Enter number: 12090
Converted number is: 12191

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