What is a built-in function?
A function that is built into an application and can be accessed by end-users. For example, most spreadsheet applications support a built-in SUM function that adds up all cells in a row or column
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Problem 5: Hero's Formula is A method for calculating the area of a triangle when you know the lengths of all three sides. Let a, b, c be the lengths of the sides of a triangle. The area is given by:A= pp-ap-b(p-c) | wherep= a+b+c2 | | Write a C-language code to calculate area of triangle using above method. Take the three lengths of the triangle from the user and display the area that your program calculates.
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