Here is part of a program that begins by having the user input the x and y dimensions of a rectangle in metres (rounded to the nearest metre): /File: rectangle.c Given the dimensions of a rectangle in metres, compute its area and perimeter length. Programmer: #include int main(void) } int x, y, area, perimeter: printf("Dimensions of the rectangle (rounded to nearest metre): "); /* you fill in the rest */ return 0; Date: Complete the program so that when the user executes it and types 2 and 4, this is what appears on the screen: Dimensions of the rectangle (rounded to nearest metre): 24 Specified Dimensions = 2 x 4 Area -8 Perimeter = 12

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.