# Random Number generator

Generating random integer between a range , 1(inclusive ) and 10 ( inclusive )
``````import random
print(random.randint(1,10))``````
Output
``3``
Displaying 10 random integers between 0 and 10
``````import random
for x in range(10):
print(random.randint(0,10),', ',end='')``````
Output
``4 , 0 , 3 , 10 , 2 , 6 , 7 , 3 , 4 , 7 ,  ``

## randrange

Random number between a range. ( start , stop [,step])
``````from random import randrange
print(randrange(10)) # From  0 to 9 ``````
Output
``3``

## without repeating numbers

Without duplicate numbers we can generate from 1 to 100 ( 10 numbers selected )
``print(random.sample(range(1,100), 10))``

## Random float

We can generate float between 0 and less than 1 ( exclusive )
``````import random
print(random.random()) # between 0 and less than 1 ``````
Output
``0.6919994035378282``

## uniform

Random float between a range of numbers
``random.uniform(1.2, 2.3) # start and stop , both inclusive ``
Output
``1.7852514538737663``
We used random.random() and random.uniform for generating random float numbers. The main difference between them are here.

random.uniform takes two parameters start and stop to return number within the range. random.random() takes no parameter and returns between 0.0 and 1. (It will return less than 1. )

random.uniform() returns between start and stop ( inclusive )

## Example

Use one function to generate marks for a class. Input to the function will be the number of students in the class. A student can secure marks between 0 and 100.
``````def gen_marks(student_no):
my_list=[]
for i in range(student_no):
my_list.append(random.randint(0,101))
return my_list

class_4=gen_marks(28) # Marks of class 4 for 28 students``````

## random string

Length of 6 chars , all lowercase. Change the char to Uppercase by using ascii_uppercase
``````import string
def id_generator(size=6, chars=string.ascii_lowercase):
return ''.join(random.choice(chars) for _ in range(size))
str1=id_generator()``````

## random string with number

``````import string
import random
def id_generator(size=6): # default size is 6
chars=string.ascii_lowercase+string.digits
return ''.join(random.choice(chars) for _ in range(size))
str1=id_generator(4)``````

## Random element from a list

``````l1=['cheking','cleaning','inspection','repair','painting']
import random
activity = random.choice(l1)
print(activity)``````

## Create a list of random elements by using a list

We will get a list ( activity ) of 10 elements by randomly selecting from a 5 elements list.
``````import random
l1=['cheking','cleaning','inspection','repair','painting']
activity = [random.choice(l1) for i in range(10)]
print(activity)``````

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