Part 1: Function in Python
Function Part_1
It is nothing but a group of related instructions to perform a particular task called function.
def and return keyword is used in function.
Syntax:
def fun_Name(parameters):
Inst1
Inst2
.
Instn
return (optional)
Example:
def yourName():
print(“My name is chaitanya”)
Parameters:
For Parameters we can say this is the input data to the function.
def yourName(name):
print("My Name is {}".format(name))
yourName("Chaitanya")
return Statement
- whenever function done with their operation and want to return any value that time we use return Statement
def full_Name(first_Name,last_Name):
fullName = first_Name + " " + last_Name
return fullName
name = full_Name("Chaitanya","Patil")
print(name)
def check_even_Odd(num):
if num%2 == 0:
return True
else:
return False
print(check_even_Odd(98))
return Multiple values from function
c,c++,Java languages can't support return Multiple values from function.But Python allows function to return multiple values
def math_operatoion(num1,num2):
add = num1 + num2
sub = num1 - num2
mul = num1 * num2
div = num1/num2
return add,sub,mul,div
add,sub,mul,div = math_operatoion(55,11)
print(add,sub,mul,div)
print(type(math_operatoion(55,11)))
Types of arguments
1.Formal arguments
2.Actaul arguments
def sum(num1,num2):#Formal Arguments
return num1+num2
add = sum(11,22)#Actual Arguments
print(add)
2.Actaul arguments
#There are four types of actual arguments
A.Positional arguments
B.Keyword arguments
C.Default arguments
D.Variable length arguments
A.Positional arguments
Need to pass in correct position to function.
number of arguments and postional arguments must be matched
If position change then result also change.
def subtraction(num1,num2):
return num1 - num2
print(subtraction(300,100))
print(subtraction(100,300))
B.Keyword arguments
we pass value with keyword that is parameter name
order not mattered but number of arguments must be matched
we can use both postional and keyword arguments together but first we have to use positional keyword order required
def addition(num1,num2):
return num1 + num2
print(addition(num2=300,num1=100))
#print(addition(100,num1=300))
print(addition(100,num2=300))
#print(addition(num1=300,100))
C.default arguments
able to provide a default value to formal arguments that is optional argument
after default argument not take non default argument
#def multiplication(num1 = 100,num2):
# return num1 * num2
def multiplication(num1,num2 = 100):
return num1 * num2
print(multiplication(100))
#print(multiplication(100,num1=300))
print(multiplication(100,num2=300))
#print(addition(num1=300,100))
D.Variable length arguments
we can pass number of arguments to the function using *.
able to mix positional and variable together
def sum(*n):
total = 0
for num1 in n:
total += num1
print(total)
sum(11,22)
sum(11,22,33)
sum(11,22,33,66)
def mul11(aa,*n):
total = 0
for num1 in n:
total += num1
print(total)
mul11(11,56,88)
# After variable length argument,if we are taking any other arguments then we should provide values as keyword arguments
def div(*n,num):
for num1 in n:
print(num1)
print(num)
div(11,22,33,44,num=22)
#we are able to write keyword variable length argument for that we need to use **. we not able to write any other argument after that
def ope(num,**n):
for num1 in n:
print(num1)
print(num)
ope(n1=33,n2=44,n3=88,num=100)
'''def ope(**n,num):
for num1 in n:
print(num1)
print(num)'''
def ope(**n):
for key,value in n.items():
print(value)
ope(n1=33,n2=44,n3=88,num=100)
