# Find out frequency of unique numbers in a list

Frequency of unique number is one such question that almost every python programmer try to solve. We will solve this problem by using a list and a python dictionary.

The program, first of all, generates a list of n number from keyboard and then it will find out the frequency of all the unique element.

## Source code to find out the frequency of unique numbers

#program to create a list of n numbers from keyboard and create a frequency table for all unique number # made by : rakesh kumar numbers = [] n = int(input('Enter value of n :')) for i in range(n): x = int(input('Enter any number :')) numbers.append(x) unique = [] frequency = [] for a in numbers: if a not in unique: unique.append(a) count = numbers.count(a) frequency.append(count) # print unique numbers and frequency table print('Unique Number\t\t Frequency') for i in range(len(unique)): print(unique[i], frequency[i], sep='\t\t')

In the above program, we use two lists to store unique numbers and frequency of each such unique numbers. Besides these **not in container operator** and **count()** method to find out frequency.

The output of the above program

$ C:/Python37/python.exe c:/Users/rakesh/Desktop/table.py Enter value of n :6 Enter any number :12 Enter any number :34 Enter any number :5 Enter any number :6 Enter any number :5 Enter any number :6 12 1 34 1 Enter any number :3 Unique Number Frequency 12 1 1 1 2 1 34 1 4 1 5 1 56 1 3 1

**Extra Challenge: **Modify the above program so that it can be used on any type of data available in the list ie heterogeneous type of data.