Functions are small units of code that carry out specific functionalities as defined by the user.
The syntax is def followed by the function name.
A function either returns a value or not.
def fun_1():
print("Metric Coder")
fun_1()
A function can take any number of parameters as seen in this example.
def fun_2(a, b):
print(a, b)
fun_2(10, 20)If the number of parameters are unknown, we can use * before the variable name.
def fun_3(*a):
for x in a:
print(x)
fun_3(1, "a", 3)
If there are many keyword arguments and you do not know how many such arguments will be passed, then we can use ** before the variable name.
def fun_3(**a):
for x in a:
print(x, a[x])
fun_3(k = 1, l = "a", m = 3)
The default value of the variable can be defined in the function definition. As a result, when the function is called and if the parameter is not passed, then the default value is used.
def fun_4(a = 3):
print(a)
fun_4()
fun_4(20)
def fun_5():
return 10
x = fun_5()
print(x)The link to the Github repository is here .