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Python program to find the sum of dictionary keys

• Last Updated : 01 Oct, 2020

Given a dictionary with integer keys. The task is to find the sum of all the keys.

Examples:

Input : test_dict = {3 : 4, 9 : 10, 15 : 10, 5 : 7}
Output : 32
Explanation : 3 + 9 + 15 + 5 = 32, sum of keys.

Input : test_dict = {3 : 4, 9 : 10, 15 : 10}
Output : 27
Explanation : 3 + 9 + 15 = 27, sum of keys.

Method #1: Using loop

This is one of the ways in which this task can be performed. In this, we iterate all the keys in the dictionary and compute summation using a counter.

Python3

 # Python3 code to demonstrate working of# Dictionary Keys Summation# Using loop  # initializing dictionarytest_dict = {3: 4, 9: 10, 15: 10, 5: 7, 6: 7}  # printing original dictionaryprint("The original dictionary is : " + str(test_dict))  res = 0for key in test_dict:      # adding keys    res += key  # printing resultprint("The dictionary keys summation : " + str(res))
Output

The original dictionary is : {3: 4, 9: 10, 15: 10, 5: 7, 6: 7}
The dictionary keys summation : 38

Method #2 : Using keys() + sum()

This is shorthand with the help of which this task can be performed. In this, we extract all keys in list using keys(), and the summation is performed using sum().

Python3

 # Python3 code to demonstrate working of# Dictionary Keys Summation# Using keys() + sum()  # initializing dictionarytest_dict = {3: 4, 9: 10, 15: 10, 5: 7, 6: 7}  # printing original dictionaryprint("The original dictionary is : " + str(test_dict))  # sum() performs summationres = sum(list(test_dict.keys()))  # printing resultprint("The dictionary keys summation : " + str(res))
Output
The original dictionary is : {3: 4, 9: 10, 15: 10, 5: 7, 6: 7}
The dictionary keys summation : 38

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