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Min function in Python returns the smallest item from an iterable or from two and more arguments .

## Syntax of min function in Python

min(collection[,key])

## Parameters of min function in Python

- collection = collection is the list of objects separated by comma or any iterable .
- key =
**Optional**. It is a one argument function that will be applied to every object of the collection or to every item in the iterable . Must be in keyword form .

## Return type of min function in Python

It returns the the largest item from an iterable or from two and more arguments .

## Examples of min function in Python

#### Example 1: Get the minimum number from a list of numbers

```
# Get the minimum number from a list of numbers
min_num=min(10,5,16,34,6)
print(min_num)
```

5

In the above code we have find the minimum number from the given numbers using `min()`

function . Here as collection parameter we have used a list of objects separated by comma .

#### Example 2: Get the smallest item from an iterable

```
# get the smallest item from a list
min_item = min([10,5,16,34,6])
print("min item from the list is =",min_item)
# get the smallest item from a tuple
min_item = min((10,5,16,34,6))
print("min item from the tuple is =",min_item)
# get the smallest item from a set
min_item = min({10,5,16,34,6})
print("min item from the set is =",min_item)
# get the smallest item from a dictionary
min_item = min({10:1,5:2,16:3,34:4,6:5})
print("min item from the dictionary is =",min_item)
# get the smallest item from a string
min_item = min("32576")
print("min item from the string is =",min_item)
```

min item from the list is = 5 min item from the tuple is = 5 min item from the set is = 5 min item from the dictionary is = 5 min item from the string is = 2

In the above code we have got smallest item from various iterable using `min()`

function .

#### Example 3: Min function with key parameter

```
# getting the smallest item from a list
# without using key parameter
min_item=min(["2","11","22","3"])
print("min item without key parameter =",min_item)
# getting the smallest item from a list
# using key parameter
min_item=min(["2","11","22","3"],key=int)
print("min item with key parameter =",min_item)
```

min item without key parameter = 11 min item with key parameter = 2

- In the above code first we have got the smallest element from the list using
`min()`

function without`key`

parameter . As`"11"`

is the smallest item so it returned`"11"`

. - Then we have used
`min()`

function with key parameter to get the smallest element from the list . We have used**int()**function as`key`

parameter . We do not need to call the function we only need to mention the function name . As a result all the string of the list is converted to integer . Now`3`

is the smallest integer in the list . So the program returned`3`

.

#### Example 4: Get the smallest pair from a list whose multiplication is the lowest

```
# getting the smallest pair from a list
# whose multiplication is the lowest
# defining the key function
def multiply(mytuple):
multiplication=1
for no in mytuple:
multiplication*=no
return multiplication
min_pair=min([(5,4),(6,3),(7,2)],key=multiply)
print("min pair is =",min_pair)
```

min pair is = (7, 2)

- In the above code we have defined a function
`multiply`

which will take a tuple of numbers and muliply the numbers and return their multiplication . - Then we have used this function as the key parameter of
`min()`

function . Now`multiply()`

function has converted`(5,4)`

to`20`

,`(6,3)`

to`18`

and`(7,2)`

to`14`

. As`14`

is the largest number so program returned`(7,2)`

.

#### Example 5: Use lambda expression as key parameter of min() function

```
# getting the smallest pair from a list
# whose multiplication is the lowest
min_pair=min([(5,4),(6,3),(7,2)],key=lambda x:x[0]*x[1])
print("min pair is =",min_pair)
```

min pair is = (7, 2)

In the above code we have solved the previous problem using lambda expression as key parameter .

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