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# Python – Test for all Even elements in the List for the given Range

• Last Updated : 08 Mar, 2023

Given a List of elements, test if all elements are even in a range.

Input : test_list = [3, 1, 4, 6, 8, 10, 1, 9], i, j = 2, 5
Output : True
Explanation : 4, 6, 8, 10, all are even elements in range.

Input : test_list = [3, 1, 4, 6, 87, 10, 1, 9], i, j = 2, 5
Output : False
Explanation : All not even in Range.

Method #1: Using loop

In this, we iterate for part of list in the specified range, and flag off the list even if we find anyone odd occurrence in list.

## Python3

 `# Python3 code to demonstrate working of``# Test for all Even elements in List Range``# Using loop` `# initializing list``test_list ``=` `[``3``, ``1``, ``4``, ``6``, ``8``, ``10``, ``1``, ``9``]` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))` `# initializing range``i, j ``=` `2``, ``5` `res ``=` `True``for` `idx ``in` `range``(i, j ``+` `1``):``    ` `    ``# check if any odd``    ``if` `test_list[idx] ``%` `2` `:``        ``res ``=` `False``        ``break` `# printing result``print``(``"Are all elements even in range : "` `+` `str``(res))`

Output

```The original list is : [3, 1, 4, 6, 8, 10, 1, 9]
Are all elements even in range : True```

Time Complexity: O(n)
Auxiliary Space: O(1)

Method #2: Using all() + list comprehension

In this, all elements to be even are checked using all(), and list comprehension is used to loop over the elements in the range.

## Python3

 `# Python3 code to demonstrate working of``# Test for all Even elements in List Range``# Using all() + list comprehension` `# initializing list``test_list ``=` `[``3``, ``1``, ``4``, ``6``, ``8``, ``10``, ``1``, ``9``]` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))` `# initializing range``i, j ``=` `2``, ``5` `# all() checks for all even elements``res ``=` `all``(test_list[idx] ``%` `2` `=``=` `0` `for` `idx ``in` `range``(i, j ``+` `1``))` `# printing result``print``(``"Are all elements even in range : "` `+` `str``(res))`

Output

```The original list is : [3, 1, 4, 6, 8, 10, 1, 9]
Are all elements even in range : True```

Time Complexity: O(n) where n is the number of elements in the list “test_list”.  all() + list comprehension n number of operations.
Auxiliary Space: O(1), no extra space is required

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