functions in python

1#Letters, Nums,
2#& underscores
3#only, can't	=7  
4#start w/ num	|		  _ 5 is the default value if no
5# 	  |			|		 |  value is passed
6#	  v         v        v
7def funcName(param1, param2=5): #The colon terminates func header 
8	str(param1) #Typecasting is temparary
9    strVar = str(param1) # To make typecast perma, assign to var
10    param1 = param2 # 5 is passed to param1 
11    return param1 # 5 is returned
12#	  ^      ^
13#     |		 |_ return value is optional, if no return value, func 
14  #Optional		will end returning to func call
15  #return
16
17x = funcName(7)
18print(x) # prints 5

1OK, basically def function() is a block where you will have one task that you can repeat all over again in the code to make it look short and clean

1
2  def my_function():
3  print("Hello from a function")
4
5
6  my_function() 

1# Functions
2
3""" All the functions are followed by the 'def' keyword in python"""
4
5def Greet(User): # The arguments inside the brackets should be called or the function gives you an error
6  print("Hello" + User + "!")
7  
8# Calling the function
9
10Greet("Shivram")
11
12# Output: 'Hello Shivram !' 
13  

1#Functions
2#Functions are followed by the 'def' keyword
3#Name your function
4def myfunc():
5  a = 'This is a func'
6  
7#Calling the function  
8myfunc()
9print(myfunc())

1def function():
2  print("Hello there")
3  
4function()