Update

Author: utk09

.idea/workspace.xml

@@ -5,5 +5,28 @@
 To call a function, use the function name followed by parenthesis.
 '''
 
-def random():
-    pass
+# Let us write a function to calculate area_of_circle.
+
+pi = 3.14159  # we assign a value to variable "pi"
+
+
+def area_of_circle(r):  # create a function named area_of_circle and parameter "r"
+    return pi * r * r  # the formula to calculate area_of_ circle
+
+
+print(area_of_circle(5))  # prints area of circle with radius 5. Change '5' to '6' and run.
+
+x = int(input("Enter radius(r): "))  # we can even ask for user input and calculate area
+print("Area of circle from user input: ", area_of_circle(x))
+
+
+# Calculate volume of cone from user inputs
+# we will use pi which has been declared above
+
+def volume_of_cone(r, h):
+    return (1 / 3) * pi * (r * r) * (h)  # return means to give back the value obtained
+
+
+r = int(input("Enter radius(r): "))
+h = int(input("Enter height(h): "))
+print("Volume of cone from user input is: ", volume_of_cone(r, h))

7_Functions/12_IntroToFunctions.py

@@ -0,0 +1,17 @@
+'''
+Let us write a program to check if a given string is Palindrome or Not.
+A palindrome is a string that reads the same forward or reversed.
+Eg: 'abba' is Palindrome, '12321' is palindrome, 'abda' is not a palindrome.
+'''
+
+
+def palindrome(pal):
+    for i in range(len(pal) // 2):  # to find the central value and iterate till there
+        if pal[i] != pal[len(pal) - i - 1]:  # checks if last element is equal to first, 2nd last equal to 2nd and so on
+            return ("'{:s}' is not a Palindrome".format(pal))
+
+    return ("'{:s}' is Palindrome".format(pal))
+
+
+pal = str(input("Enter a string: "))
+print(palindrome(pal))