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# Python – Find Numbers in Range and not in Set

• Last Updated : 02 Feb, 2021

Given a set and range of numbers, the task is to write a Python program to extract all numbers in range not in set.

Examples:

```Input : test_set = {6, 4, 2, 7, 9}, low, high = 5, 10
Output : [5, 8]
Explanation : 6, 7 and 9 are present in set, remaining 5, 8 are in output.

Input : test_set = {6, 4, 2, 7, 9}, low, high = 5, 8
Output : [5]
Explanation : 6 and 7 are present in set, remaining 5 is in output.```

Method #1 : Using loop

In this, we iterate for all the elements in range and using conditional statements omit the elements from result which are not present in set.

## Python3

 `# Python3 code to demonstrate working of``# Range Numbers not in set``# Using loop`` ` `# initializing set``test_set ``=` `{``6``, ``4``, ``2``, ``7``, ``9``}`` ` `# printing original set``print``(``"The original set is : "` `+` `str``(test_set))`` ` `# initializing range``low, high ``=` `5``, ``10`` ` `res ``=` `[]``for` `ele ``in` `range``(low, high):`` ` `    ``# getting elements not in set``    ``if` `ele ``not` `in` `test_set:``        ``res.append(ele)`` ` `# printing result``print``(``"Elements not in set : "` `+` `str``(res))`

Output:

```The original set is : {2, 4, 6, 7, 9}
Elements not in set : [5, 8]```

Method #2 : Using “-” operator

In this, we perform task of performing getting difference from range through set elements using “-” operator.

## Python3

 `# Python3 code to demonstrate working of``# Range Numbers not in set``# Using "-" operator`` ` `# initializing set``test_set ``=` `{``6``, ``4``, ``2``, ``7``, ``9``}`` ` `# printing original set``print``(``"The original set is : "` `+` `str``(test_set))`` ` `# initializing range``low, high ``=` `5``, ``10`` ` `# using "-" operator to get difference``res ``=` `list``(``set``(``range``(low, high)) ``-` `test_set)`` ` `# printing result``print``(``"Elements not in set : "` `+` `str``(res))`

Output:

```The original set is : {2, 4, 6, 7, 9}
Elements not in set : [8, 5]```

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