Dictionaries are Python’s implementation of an associative array, which is a data structure. A dictionary is made up of a set of key-value pairs. Each key-value pair corresponds to a key and its corresponding value.

A dictionary is defined by enclosing a comma-separated list of key-value pairs in curly braces { }. Each key is separated from its associated value by a colon ‘ **:** ‘

- Python : How to Sort a Dictionary by Key or Value ?
- Python: Sort a Dictionary by Value
- Convert Dictionary Values to a List in Python

**Examples:**

**Input :**

dictionary = {'This': 100, 'is':200, 'BTechGeeks':300}

**Output:**

100

## Find the first value in a dictionary

There are several ways to find the first value in a dictionary some of them are:

- Using item() function
- Using list() and values() functions
- Using iter() and next() functions
- Retrieve the first N values from a Python dictionary

### Method #1:Using item() function

The view object is returned by the items() method. The key-value pairs of the dictionary are stored in the view object as tuples in a list. Any changes made to the dictionary will be reflected in the view object.

The dictionary’s item() function returns a view of all dictionary items in the form of a sequence of all key-value pairs. Choose the first key-value pair and the first value from this sequence.

**Below is the implementation:**

# Given Dictionary dictionary = {'this': 100, 'is': 200, 'BTechGeeks': 300} # converting dictionary items to list dictlist = list(dictionary.items()) # printing the first value of this list print(dictlist[0][1])

**Output:**

100

### Method #2:Using list() and values() functions

To complete this task, a combination of the methods listed above can be used. In this, we just convert the entire dictionaries values extracted by values() into a list and just access the first values. There is only one thing you should keep in mind when using this, and that is its complexity. It will first convert the entire dictionary to a list by iterating over each item, after which it will extract the first element. The complexity of this method would be O(n).

**Below is the implementation:**

# Given Dictionary dictionary = {'this': 100, 'is': 200, 'BTechGeeks': 300} # converting dictionary values to list dictlist = list(dictionary.values()) # printing the first value of this list print(dictlist[0])

**Output:**

100

### Method #3:Using iter() and next() functions

These functions can also be used to complete this task. In this case, we simply use next() to get the first next value, and the iter() function is used to get the iterable conversion of dictionary items. So, if you only need the first value, this method is more efficient. Its complexity would be O(1).

**Below is the implementation:**

# Given Dictionary dictionary = {'this': 100, 'is': 200, 'BTechGeeks': 300} # Get first value of dictionary using iter firstval = next(iter(dictionary.items()))[1] # printing the first value print(firstval)

**Output:**

100

### Retrieve the first N values from a Python dictionary

### Using list() + values() +slicing:

Convert the dictionary values into a list.

Retrieve the first n values of the dictionary using slicing.

**Below is the implementation:**

# Given Dictionary dictionary = {'this': 100, 'is': 200, 'BTechGeeks': 300} # Given n n = 2 # converting dictionary values to list dictvalues = list(dictionary.values()) # print all values upto n using slicing print(*dictvalues[:n])

**Output:**

100 200

**Related Programs**:

- python how to get all keys with maximum value in a dictionary
- get first key value pair from a python dictionary
- python check if a value exists in the dictionary
- python how to get first n characters in a string
- java how to get all keys by a value in hashmap search by value in map
- how to get first key in dictionary python
- python program to create a dictionary with key as first character and value as words starting with that character