Why change pi? there is pi built into matlab.
Project Euler: Problem 1, Multiples of 3 and 5
Find the sum of the elements in the "second" diagonal
Try 1.5.4: Celsius to Fahrenheit
Find the dimensions of a matrix
Square root of a number
Given the variable x as your input, multiply it by four, then divide it by two. Then put the result in y.
Log of a number
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