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Python program to concatenate two Integer values into one

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Given two integers a and b. The task is to concatenate these two integers into one integer. 
Examples:

Input : a = 806, b = 91
Output : 80691

Input : a = 5, b = 1091
Output : 51091

Method 1: One method of achieving this can be counting the number of digits of second number. Then multiply the first number with 10^digits and adding both the numbers. Below is the implementation. 

Python3




# Python program to concatenate
# two numbers
 
 
def numConcat(num1, num2):
 
     # find number of digits in num2
     digits = len(str(num2))
 
     # add zeroes to the end of num1
     num1 = num1 * (10**digits)
 
     # add num2 to num1
     num1 += num2
 
     return num1
 
 
# Driver's code
a = 906
b = 91
print(numConcat(a, b))


Output:

90691

Method 2: Another method can be converting both the numbers to the string. Then concatenate them and convert them back to integers. Below is the implementation. 

Python3




# Python program to concatenate
# two numbers
 
 
def numConcat(num1, num2):
      
        # Convert both the numbers to
        # strings
        num1 = str(num1)
        num2 = str(num2)
         
        # Concatenate the strings
        num1 += num2
         
        return int(num1)
 
 
# Driver's code
a = 906
b = 91
print(numConcat(a, b))


Output

90691

Method 3: Here is another approach to concatenate two integers in Python using the format() function

Python3




# Python program to concatenate
# two numbers
def numConcat(num1, num2):
  return int("{}{}".format(num1, num2))
 
#Driver's code
a = 906
b = 91
print(numConcat(a, b))
#This code is contributed by Edula Vinay Kumar Reddy


Output

90691

Time Complexity of O(1) as we are just performing string concatenation and int conversion and Space Complexity of O(n) where n is the length of the resulting concatenated string.



Last Updated : 30 Jan, 2023
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