# Calculate n + nn + nnn +… + n (m times) in Python

Python Methods and Functions

Examples:

` Input: 2 + 22 + 222 + 2222 + 22222 Output: 24690 Input: 12 + 1212 + 121212 Output: 122436 `

First, we convert numbers to string format and combine them regularly. Later, we convert them back to an integer and add them before the mth term. as shown in the following program.

 ` # Python program to summarize this series ` ` `  ` # Returns the sum n + nn + nnn + .... (m times) ` ` def ` ` Series (n, m): ` ` `  ` # Convert number to string ` ` str_n ` ` = ` ` str ` ` (n) `   ` # Initialize the result as a number and string ` ` s ums ` ` = ` ` n ` ` ` ` sum_str ` ` = ` ` str ` ` (n ) `   ` # Add remaining terms ` ` ` ` for ` ` i ` ` in ` ` range ` ` (` ` 1 ` `, m): `   ` # String concatenation makes n, nn, nnn ... ` ` sum_str ` ` = ` ` sum_str ` ` + ` ` str_n ` ` `  ` # Before adding the transform back to integer ` ` sums ` ` = ` ` sums ` ` + ` ` int ` ` (sum_str) `   ` return ` ` sums `   ` Driver code ` ` n ` ` = ` ` 2 ` ` m ` ` = ` ` 5 ` ` total ` ` = ` ` Series (n, m) ` ` print ` ` (total) `

Output:

` 24690 `