Update 09-Inbuilt_functions.md

Author: Chaitya62

python/09-Inbuilt_functions.md

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 ## max/min
 * Returns the greatest/smallest item in an iterable or the smallest of two or more arguments.
 * It can also be made to make use of key argument as used in sort function
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 ### implementation
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 ```python
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 list = [1, 4, 3, 5,9,2]
 print(max(list)) #returns maximum value of list
 print(min(list)) #returns minimum value in the list
 print(max(list[2:-2])) #returns max value combined with slicing 
 print(min(list[4:])
 print(max(4,2,3,5))
 print(min(7,2,1,8,4))
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 ```
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 Output
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 ```
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 1
@@ -126,13 +132,17 @@ Output
 
 ```
 
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 ## Reduce
 * Reduce is a really useful function for performing some computation on a list and returning the result.
 * It applies a rolling computation to sequential pairs of values in a list
 >note this not an inbuilt function as such because it needs to be imported from func tools but is pretty useful.
 
 ### implementation
 ```python
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 #Normal way to find product of elements in a list
 product = 1
 list = [1, 2, 3, 4]