Question

PYTHON:

def printHelloWorldFunction():

print("Hello, world!")

return

Could you please explain the use of putting the 'return' command at the end of the function block? Is it redundant?

Answer 1

printHelloWorldFunction() with return statement at the end of function block

// Screenshot of the code

// Sample output

// code to copy

def printHelloWorldFunction():
print("Hello, world!")
return

printHelloWorldFunction() with out return statement at the end of function block

// Screenshot of the code

// Sample output

// code to copy

def printHelloWorldFunction():
print("Hello, world!")

Explanation:

purpose-1 :

from the above screenshots we can observe that with and with out return statement at the end of printHelloWorldFunction() function block prints the same output.

However the use of return statement inside python function block is mainly for "outputting some value from this function to caller ".

A python function accepting parameters and returning a value.uses return is for the caller.

return should be used for recursive functions/methods or you want to use the returned value for later applications .

simple terms if python the return statement is used when a function is ready to return a value to its caller otherwise return can be ignored.

purpose-2:

The return statement allows you to terminate the execution of a function before you reach the end.The flow of execution immediately returns to the caller.

// Screenshot of the code
// Sample output

// code to copy

def ret(n):
if n > 9:
print("two digits")
return "two digits"   
else :
print("one digit")
return "one digit"
return