# Examples of Function - 1 Example 1: ```python def hello(): name = input("Enter your name : ") print("Welcome {} to the python functions.".format(name)) print("function calling starts") x = hello() print("function calling finished") print(x) ``` Output function calling starts Enter your name : John Welcome John to the python functions. function calling finished None Example 2: ```python # function to reverse string def reverse(string): return string[::-1] s = reverse(input("Enter a string : ")) print(s) s = reverse(input("Enter a list space seperated : ").split()) print(s) ``` Enter a string : gyansetu utesnayg Enter a list space seprated : \[1 2] \['2]', '\[1'] Example 3: ```python # function to calculate power def pow(x,y): return x**y x = pow(3,4) #positional Arguments print(x) ``` Output 81 Example 4: ```python # function to calculate power def pow(x,y): return x**y r = pow(y=2,x=3) print(r) ``` Output 9 Example 5: ```python # function to calculate power def pow(x,y): return x**y k = pow(2,4) p = pow(2,3) print(k) print(p) print(pow(y=2,x=1)) print(pow(3,y=5)) ``` Output 16 8 1 243 Example 6: ```python def swap(x,y): return y,x x,y = int(input("Enter x : ")),int(input("Enter y : ")) x,y = swap(x,y) print(x,y) ``` Output Enter x : 3 Enter y : 6 6 3 Example 7: ```python def add(*args): return sum(args) print(add()) print(add(1)) print(add(1,2)) print(add(1,2,3,4,5,6,7,8,9,10)) ``` 0 1 3 55 Example 8: ```python def info(*args): print(type(args)) c = 1 for var in args : print("value {} : {}".format(c,var)) c = c + 1 info('one','two') print("\n\n") info('hello','hi','how','are','you') ``` \ value 1 : one value 2 : two \ value 1 : hello value 2 : hi value 3 : how value 4 : are value 5 : you (\*\*) returns dictionary Example 9: ```python def info(**kwargs): print(type(kwargs)) for key,value in kwargs.items(): print("{} = {}".format(key,value)) info(name='sachin',) print() info(name='python',framework=['django','flask']) print() def info(**info): return info st1 = info(name=input("Enter your name "),addr=input("Enter your address")) print(st1) ``` \ name = sachin \ name = python framework = \['django', 'flask'] Enter your name gyansetu Enter your address gurgaon {'name': 'gyansetu', 'addr': 'gurgaon'} Example 10: ```python def calc(x,y,ch): ch = ch.strip() if ch == '+' : return x + y elif ch == '-' : return x - y elif ch == '*' : return x * y elif ch == '/' or ch == '//' or ch == '%' : if y == 0 : return "Error!!Can not Divide by Zero" else : if ch == '/' : return x / y elif ch == '//' : return x // y else : return x % y elif ch == "**" : return x ** y else : return "Error!!!Invalid Operation" r = calc(3,3,'**') print(r) ``` 27 Example 11: ```python def fun(x,y=0,*mytuple): print("Positional Argument : ",x) print("Default Argument : ",y) print("Here is Your Var length arguments : ") c = 1 for var in mytuple : print("{} Arg = {}".format(c,var)) c = c + 1 fun(1) fun(1,2) fun(1,2,3,4,5,6,7,8,9) ``` Positional Argument : 1 Default Argument : 0 Here is Your Var length arguments : Positional Argument : 1 Default Argument : 2 Here is Your Var length arguments : Positional Argument : 1 Default Argument : 2 Here is Your Var length arguments : 1 Arg = 3 2 Arg = 4 3 Arg = 5 4 Arg = 6 5 Arg = 7 6 Arg = 8 7 Arg = 9 Example 12: ```python def fun1(*args): print(args) fun1(1,2,3) fun1(4,5,6,7,8,'hello','hi','bye') ``` (1, 2, 3) (4, 5, 6, 7, 8, 'hello', 'hi', 'bye') Example 13: ```python def count_Digits(num): """count_Digits(num) -> This function takes a num as formal argument and return no of digits in the num.""" count = 0 while num: num = num // 10 count = count + 1 return count n_digit = count_Digits(int(input("Enter number : "))) print("Number of Digits = ",n_digit) ``` Enter number : 34 Number of Digits = 2 Example 14: ```python #recursion #Factorial import time num = int(input("Enter a no to calculate factorial : ")) c = time.time() s = 1 for var in range(1,num+1): s = s * var n = time.time() #print(s) print("Time Taken = ",n-c) ``` Enter a no to calculate factorial : 23 Time Taken = 0.0 Example 15: ```python # Armstrong Number def count_Digits(num): """count_Digits(num) -> This function takes a num as formal argument and return no of digits in the num.""" count = 0 while num: num = num // 10 count = count + 1 return count def check_Armstrong(num): p = count_Digits(num) copy_num = num s = 0 while num : r = num % 10 s = s + r**p num = num // 10 if s == copy_num : return True else : return False def armstrong(): if check_Armstrong(int(input("Enter a number : "))) : print("Given number is Armstrong ") else : print("Given number is not A Armstrong Number ") if input("\nType something to repeat Again") : armstrong() armstrong() ``` Enter a number : 59 Given number is not A Armstrong Number Type something to repeat Again (Note: An **Armstrong number** of three digits is an integer such that the sum of the cubes of its digits is equal to the **number** itself. For example, 371 is an **Armstrong number** since 3\*\*3 + 7\*\*3 + 1\*\*3 = 371. Write a program to find all **Armstrong number** in the range of 0 and 999) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://gyansetu-python.gitbook.io/python-programming/functions-in-python/examples-of-function-1.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.