the Return statement

The return statement causes your function to exit and returns a value to its caller. The point of functions in general is to take inputs and return something.

The return statement is used when a function is ready to return a value to its caller. So, only one return statement is executed at run time even though the function contains multiple return statements.

Any number of 'return' statements are allowed in a function definition but only one of them is executed at run time.

Syntax of return

return [expression list ]

This statement can contain expression which gets evaluated and the value is returned. If there is no expression in the statement or the return statement itself is not present inside a function, then the function will return the None object.

Example :

# return statment
def usr_abs (n):
	if n>=0:
		return n
	else:
		return –n
# Now invoking the function
x=int (input(“Enter a number :”)
print (usr_abs (x))

Output 1:

Enter a number : 25

Output 2:

Enter a number : -25

Qus. 1 : What is the return type of following function ?<pre>def func1():        return 'mnp',22 print(type(func1()))</pre>

List
Dictionary
String
Tuple

Qus. 2 : What is the output of the following code ?<pre>def disp(*arg):     for i in arg:         print(i) disp(name="Rajat", age="20")</pre>

TypeError
Rajat 20
Name age
None of these

Qus. 3 : What will be the output of the following Python code ?<pre>def display(b,n):     while n>0:         print(b,end='')         n=n-1 display('z',3)</pre>

zzz
zz
Infinite loop
An exception is thrown

Qus. 4 : If return statement is not used inside the function, the function will return:

None
0
Null
Arbitary value

Qus. 5 : If a function doesn't have a return statement, which of the following does the function return ?

int
null
None
An exception is thrown without the return statement

Programs

Python program to convert decimal into other number systems