How to give commands in python with examples

How to give commands in python with examples

In Python, you can use the input() function to read user input and store it as a string. However, this is not the most common way to get user input or execute specific commands.

To give commands in Python, you can use conditional statements like if-else and switch-case, loops, functions, and modules. Here are some examples:

Example 1: Conditional Statement (if-else)

command = input("Enter a command (add/subtract/multiply/divide): ")
if command == "add":
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
result = num1 + num2
print("Result:", result)
elif command == "subtract":
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
result = num1 - num2
print("Result:", result)
... and so on for other commands ...
else:
print("Invalid command. Try again!")

In this example, the program asks the user to enter a command (add, subtract, multiply, or divide). Based on the entered command, it executes the corresponding calculation.

Example 2: Switch-Case Statement

command = input("Enter a command (add/subtract/multiply/divide): ")
commands = {
"add": lambda: print("Result:", int(input("Enter first number: ")) + int(input("Enter second number: ")))),
"subtract": lambda: print("Result:", int(input("Enter first number: ")) - int(input("Enter second number: ")))),
... and so on for other commands ...
}
try:
commandscommand
except KeyError:
print("Invalid command. Try again!")

This example uses a dictionary to store the different commands and their corresponding functions. The program looks up the entered command in the dictionary and executes the associated function.

Example 3: Loops

while True:
command = input("Enter a command (quit/insert/remove): ")
if command == "quit":
break
elif command == "insert":
print("Inserting new item...")
elif command == "remove":
print("Removing existing item...")
else:
print("Invalid command. Try again!")

In this example, the program uses an infinite loop to repeatedly ask the user for a command until they enter "quit". Depending on the entered command, it executes different actions.

Example 4: Functions

def add_numbers(num1, num2):
return num1 + num2
def subtract_numbers(num1, num2):
return num1 - num2
... and so on for other commands ...
while True:
command = input("Enter a command (add/subtract/...): ")
if command == "add":
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
print("Result:", add_numbers(num1, num2))
elif command == "subtract":
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
print("Result:", subtract_numbers(num1, num2))
... and so on for other commands ...

This example uses functions to encapsulate the logic for each command. The program calls the appropriate function based on the entered command.

These are just a few examples of how you can give commands in Python. Depending on your specific use case, you may need to use a combination of these approaches or come up with your own creative solution!

How to give commands in python for beginners

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