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# Python | Consecutive Character Maximum difference

• Last Updated : 30 Jan, 2020

Sometimes, we might have a problem in which we require to get the maximum difference of 2 numbers from list but with a constraint of having the numbers in successions. This type of problem can occur while competitive programming. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using `max() + zip()` + list comprehension
This problem can be solved using the combination of above three function in which max function can be used to get the maximum value, zip and list comprehension doing the task of extending the logic to the whole list.

 `# Python3 code to demonstrate``# Consecutive Character Maximum difference``# using zip() + max() + list comprehension`` ` `# initializing string ``test_string ``=` `'6543452345456987653234'`` ` `# printing original string ``print``(``"The original string : "` `+` `str``(test_string))`` ` `# using zip() + max() + list comprehension``# Consecutive Character Maximum difference``test_string ``=` `list``(test_string)``res ``=` `max``(``abs``(``int``(a) ``-` `int``(b)) ``for` `a, b ``in` `zip``(test_string, test_string[``1``:]))`` ` `# print result``print``(``"The maximum consecutive difference is : "` `+` `str``(res))`
Output :
```The original string : 6543452345456987653234
The maximum consecutive difference is : 3
```

Method #2 : Using `max() + map() + operator.sub`
The above problem can also be solved using yet another combination of functions. In this combination, map functions performs the task of extending the logic to whole list and mul operator is used to perform the difference.

 `# Python3 code to demonstrate``# Consecutive Character Maximum difference``# using max() + map() + operator.sub``from` `operator ``import` `sub`` ` `# initializing string ``test_string ``=` `'6543452345456987653234'`` ` `# printing original string ``print``(``"The original string : "` `+` `str``(test_string))`` ` `# using max() + map() + operator.sub``# Consecutive Character Maximum difference``res ``=` `max``(``map``(sub, ``map``(``int``, test_string), ``map``(``int``, test_string[``1``:])))`` ` `# print result``print``(``"The maximum consecutive difference is : "` `+` `str``(res))`
Output :
```The original string : 6543452345456987653234
The maximum consecutive difference is : 3
```

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