Update: Basic list

Diff for: README.md

@@ -1,2 +1,21 @@
 # golang-coding-exercises
 Golang coding exercises uploaded while learning
+
+## Exercises
+- [Basic](#basic)
+
+### Basic
+- [Sum of two numbers](basic/sum_of_two_numbers.go)
+- [Arithmetic operations](basic/arithmetic_operations.go)
+- [Input from user](basic/input_from_user.go)
+- [Accept length and breadth of a rectangle. Then find perimeter and area of a rectangle](basic/rectangle_area_and_perimeter.go)
+- [Accept radius of a circle. Then find diameter and circumference of a circle](basic/circle_diameter_and_circumference.go)
+- [Accept temperature in Celsius and convert it into Fahrenheit.](basic/celsius_to_fahrenheit.go)
+- [Program to convert days into years, weeks and days](basic/days_to_years.go)
+- [Program to enter two angles of a triangle and find the third angle](basic/third_angle_of_triangle.go)
+- [Program to enter base and height of a triangle and find its area](basic/area_of_triangle.go)
+- [Program to calculate area of an equilateral triangle](basic/area_of_equilateral_triangle.go)
+- [Program to find power of any number x ^ y](basic/power_of_a_number.go)
+- [Program to enter marks of five subjects and calculate total, average and percentage](basic/student_marks.go)
+- [Program to enter P, N, R and calculate Simple Interest](basic/simple_interest.go)
+- [Program to enter P, N, R and calculate Compound Interest](basic/compound_interest.go)