Let us take an example to implement the switch case in Python.
Method 1: Using case
print("You can choose from the following language")
print("1. JavaScript\n2. Python\n3. PHP\n4. Solidity\n5. Java\n6. Other \n ")
print(">>NOTE: Your input is case sensitive. Enter first letter in capital<< \n ")
prog_language = input("What's the programming language you want to learn? ")
match prog_language:
case "JavaScript":
print("You can become a web developer.")
case "Python":
print("You can become a Data Scientist")
case "PHP":
print("You can become a backend developer")
case "Solidity":
print("You can become a Blockchain developer")
case "Java":
print("You can become a mobile app developer")
case _:
print("The language doesn't matter, what matters is solving problems.")Output:
You can choose from the following language
1. JavaScript
2. Python
3. PHP
4. Solidity
5. Java
6. Other
>>NOTE: Your input is case sensitive. Enter first letter in capital<<
What's the programming language you want to learn? Solidity
You can become a Blockchain developer
What's the programming language you want to learn? Javascript
You can become a web developer.Explanation:
Here we took the input from the user and then passed that input to match it with the different cases. We assigned each case a different programming language and based on that whichever case is called, the code inside that is rendered. Let us take a look at other ways too.
Method 2: Implementing switch case using if-else
bike = input("Enter bike name: ")
if bike == 'Hero':
print("The name of bike is Hero")
elif bike == "Suzuki":
print("The name of bike is Suzuki")
elif bike == "Yamaha":
print("The name of bike is Yamaha")
else:
print("Please choose correct answer")Explanation:
Here we made use of conditionals to make a switch case. Based on the input of the user we match the input of the user with the value corresponding to the if/else statement.
Method 3: Using functions
class switch_func: def day(self, month): default = "Incorrect day" return getattr(self, 'case_' + str(month), lambda: default)() def case_1(self): return "Jan" def case_2(self): return "Feb" def case_3(self): return "Mar" def case_4(self): return "Apr" def case_5(self): return "May" switch_case = switch_func() print(switch_case.day(1)) print(switch_case.day(5))
Method 4: Using switcher
def addition_num(num1, num2):
num1 += num2
return num1
def subtraction_num(num1, num2):
num1 -= num2
return num1
def mul_num(num1, num2):
num1 *= num2
return num1
def division_num(num1, num2):
num1 /= num2
return num1
def default(num1, num2):
return "Incorrect day"
switcher = {
1: addition_num,
2: subtraction_num,
3: mul_num,
4: division_num,
}
def switch(operation, num1, num2):
return switcher.get(operation, default)(num1, num2)
print('''You can perform operation
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. Module ''')
# Take input from user
choice = int(input("Select operation from 1,2,3,4 : "))
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
print (switch(choice, num1, num2))Here is the end of our article. We saw overall 4 methods by which we can use switch cases.
