Python Program for Dictionary clear() Function

In the previous article, we have discussed Python Program for Area of a Polygon with Given n Ordered Vertices
Dictionary in python :

A dictionary is a set of elements that have key-value pairs. The values in the elements are accessed using the element’s keys.

Examples:

Example1:

Input:

Given dictionary = {'hello': 100, 'this': 200, 'is': 300, 'btechgeeks': 400}

Output:

The given dictionary before clearing is :
{'hello': 100, 'this': 200, 'is': 300, 'btechgeeks': 400}
The length of the given dictionary before clearing =  4
The given dictionary After clearing is :
{}
The length of the given dictionary After clearing =  0

Example2:

Input:

Given dictionary = {'good': '1', 'morning': '2', 'this': '3', 'is': '4', 'btechgeeks': '5'}

Output:

The given dictionary before clearing is :
{'good': '1', 'morning': '2', 'this': '3', 'is': '4', 'btechgeeks': '5'}
The length of the given dictionary before clearing = 5
The given dictionary After clearing is :
{}
The length of the given dictionary After clearing = 0

Program for Dictionary clear() Function in Python

Using Built-in Functions (Static Input)
Using Built-in Functions (User Input)

Dictionary clear() Function:

clear() is a Python dictionary method that removes all items from the dictionary.

Syntax:

dict.clear()

Parameters: NA

Return Value: This method has no return value.

Method #1: Using Built-in Functions (Static Input)

Approach:

Give the dictionary by initializing it with some random values and store it in a variable.
Print the above-given dictionary before clearing.
Calculate the length of the given dictionary using the len() function and print it.
Apply clear() function to the given dictionary.
Print the above-given dictionary after clearing it.
Calculate the length of the above dictionary after clearing using the len() function and print it.
The Exit of the program.

Below is the implementation:

# Give the dictionary by initializing it with some random values and store it
# in a variable.
gvn_dictinry = {'hello': 100, 'this': 200, 'is': 300, 'btechgeeks': 400}
# Print the above-given dictionary before clearing.
print("The given dictionary before clearing is :")
# Calculate the length of the given dictionary using the len() function and print it.
print(gvn_dictinry)
print("The length of the given dictionary before clearing = ", len(gvn_dictinry))
# Apply clear() function to the given dictionary.
gvn_dictinry.clear()
# Print the above-given dictionary after clearing it.
print("The given dictionary After clearing is :")
print(gvn_dictinry)
# Calculate the length of the above dictionary after clearing using the len() function
# and print it.
print("The length of the given dictionary After clearing = ", len(gvn_dictinry))

Output:

The given dictionary before clearing is :
{'hello': 100, 'this': 200, 'is': 300, 'btechgeeks': 400}
The length of the given dictionary before clearing =  4
The given dictionary After clearing is :
{}
The length of the given dictionary After clearing =  0

Method #2: Using Built-in Functions (User Input)

Approach:

Take a dictionary and initialize it with an empty dictionary using dict() or {}.
Give the number of keys as user input using int(input()) and store it in a variable.
Loop till the given number of keys using for loop.
Inside the for loop scan the key and value as user input using input(), split() functions, and store them in two separate variables.
Initialize the key with the value of the dictionary.
Print the above-given dictionary before clearing.
Calculate the length of the given dictionary using the len() function and print it.
Apply clear() function to the given dictionary.
Print the above-given dictionary after clearing it.
Calculate the length of the above dictionary after clearing using the len() function and print it.
The Exit of the program.

Below is the implementation:

# Take a dictionary and initialize it with an empty dictionary using dict() or {}.
gvn_dict = {}
# Give the number of keys as user input using int(input()) and store it in a variable.
numb_of_kys = int(
    input('Enter some random number of keys of the dictionary = '))
# Loop till the given number of keys using for loop.
for p in range(numb_of_kys):
        # Inside the for loop scan the key and value as
    # user input using input(),split() functions
    # and store them in two separate variables.
    keyy, valuee =  input(
        'Enter key and value separated by spaces = ').split()
    # Initialize the key with the value of the dictionary.
    gvn_dict[keyy] = valuee

# Print the above-given dictionary before clearing.
print("The given dictionary before clearing is :")
# Calculate the length of the given dictionary using the len() function and print it.
print(gvn_dict)
print("The length of the given dictionary before clearing = ", len(gvn_dict))
# Apply clear() function to the given dictionary.
gvn_dict.clear()
# Print the above-given dictionary after clearing it.
print("The given dictionary After clearing is :")
print(gvn_dict)
# Calculate the length of the above dictionary after clearing using the len() function
# and print it.
print("The length of the given dictionary After clearing = ", len(gvn_dict))

Output:

Enter some random number of keys of the dictionary = 5
Enter key and value separated by spaces = good 1
Enter key and value separated by spaces = morning 2
Enter key and value separated by spaces = this 3
Enter key and value separated by spaces = is 4
Enter key and value separated by spaces = btechgeeks 5
The given dictionary before clearing is :
{'good': '1', 'morning': '2', 'this': '3', 'is': '4', 'btechgeeks': '5'}
The length of the given dictionary before clearing = 5
The given dictionary After clearing is :
{}
The length of the given dictionary After clearing = 0

Program for Dictionary clear() Function in Python

Method #1: Using Built-in Functions (Static Input)

Method #2: Using Built-in Functions (User Input)

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