Dictionary is an important data structure of Python which contains key-value pairs. The values are not accessible with normal index (like a list) but with their keys. Here is the optimized Python program to find the sum of all values in a dictionary.

## Python Program: Sum of dictionary values using the sum function

This is the simplest one-line solution to find the total sum of values in any Python dictionary.

```
myDict = {'a': 1, 'b': 2, 'c': 3}
total = sum(myDict.values())
print("The sum of all items in dictionary is {}".format(total))
```

The sum of all items in dictionary is 6

At the very first line, we declared a dictionary.

The second line contains the logic of the code. The `values()`

method of dictionary returns an iterable of type `dict_values`

which contains the values of that dictionary.

The `sum()`

function takes an iterable as an argument and returns the total sum of all its elements.

Finally, we print the resulting sum of all values in the dictionary.

## Python Program: Find the Sum of dictionary using for loop

```
myDict = {'a': 1, 'b': 2, 'c': 3}
total = 0
for i in myDict.values():
total+=i
print("The sum of all items in dictionary is {}".format(total))
```

The sum of all items in dictionary is 6

The logic of this Python code is to loop through the dictionary values and find the sum of all items in the dictionary.

The above code has features that may be Python-specific but the code below is suited for almost all programming languages.

This approach is useful to find the sum of all items of any dictionary or key-value pair.

```
myDict = {'a': 1, 'b': 2, 'c': 3}
total = 0
for i in myDict:
total+=myDict[i]
print("The sum of all items in dictionary is {}".format(total))
```

The sum of all items in dictionary is 6

The dictionary values can be accessed by their keys. The for loop iterate through the dictionary keys add the values to the `total`

variable.

Here is a short demonstration of how to get dictionary values in Python.

```
myDict = {'a': 1, 'b': 2, 'c': 3}
myDict['a']
myDict['b']
myDict['c']
```

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