functions

src/basic/functions.py

@@ -0,0 +1,117 @@
+
+
+def my_function():
+    print("Anikuttan")
+
+
+# calling the function
+my_function()
+
+
+# name is Positional Arguments
+def say_my_name(name):
+    print(f"Hello {name}")
+
+
+# calling
+say_my_name("Kuttan")
+say_my_name(name="Kuttan")
+say_my_name()  # gives error because the positional arguments is missing
+say_my_name(name1="Kuttan")  # it gives unexpected keyword argument
+
+
+def say_my_full_name(first_name, last_name):
+    print(first_name + " " + last_name)
+
+
+say_my_full_name(first_name="Ani", last_name="kuttan")  # calling
+
+# If the number of positional arguments is unknown, add a * before the parameter name
+# *args give the tuple of arguments,
+
+
+def my_function(*kids):
+    print("The youngest child is " + str(kids[0]))
+    print(type(kids))
+
+
+my_function("Emil", "Tobias", "Linus")
+
+
+# If the number of keyword  arguments is unknown, add a ** before the parameter name
+# **kwargs give the dict of arguments,
+def my_function2(**kids):
+    print("The youngest child is " + str(kids))
+    print("The youngest child is " + str(kids['name']))
+    print(type(kids))
+
+
+my_function2(name="Emil", month="May", age="12")
+
+
+# default value
+def say_my_name(name="Name"):
+    print(name)
+
+
+say_my_name()
+say_my_name("Anikuttan")
+
+# Return Values
+
+
+def my_function(x):
+    return 5 * x
+
+
+print(my_function(3))
+print(my_function(5))
+print(my_function(9))
+
+# To specify function can have only positional arguments, add , / after the arguments:
+
+
+def my_function(x, /):
+    print(x)
+
+
+# my_function(3)
+# my_function(x=3)
+my_function(x=3)
+
+
+# Keyword-Only Arguments
+# To specify that a function can have only keyword arguments, add *, before the arguments
+def my_function(*, x):
+    print(x)
+
+
+my_function(x=3)
+
+
+# Combine Positional-Only and Keyword-Only
+# a, b is positional
+# c, d is keyword
+def my_function(a, b, /, *, c, d):
+    print(a + b + c + d)
+
+
+my_function(5, 6, c=7, d=8)
+
+# return type
+
+
+def say_my_name(name) -> str:
+    return name
+
+
+my_name = say_my_name("ANikuttan")
+print(my_name)
+
+
+def add(a, b) -> int:
+    return a + b
+
+
+number = add(a=10, b=20)
+print(number)