C program to find the circumference of a circle

The boundary of a circle is known as the Circumference of a circle.

All the points that form the boundary or the circumference of the circle are equidistant from a single point inside the circle.

The single point that is present inside the circle is also known as the Center of the circle. The distance from the Center of a circle to any point on the circumference is equal. It is regarded as the radius of the very circle.

The formula used to calculate circumference of a circle is: C = dπ

C = 2πr (since d = 2r) where, d and r are the diameter and radius respectively.

Prerequisites:

1. Knowing the float and int data types
2. C format specifiers

Float data type in C:

The float data type in C represents the floating point numbers, the float values which are specified with a decimal point to separate integer and the fractional parts.

For example, 69.75,6.58..

Floats may also be expressed in scientific notations e or E, which indicates the power of 10.

Int datatype in C:

Integers are whole numbers that can have both zero, positive and negative values but no decimal values. We can use int data type to denote an integer value in C.

C format specifiers:

The format specifiers are used in C for input and output purposes. The compiler can understand that what type of data is in a variable during taking input using the scanf() function and printing using printf() function.

Here, we use % f specifier which represents a floating point number (or) flaot values.

Code:

Here, the circumference of the circle formula, c=2pi (r) is used, where pi equals 22/7.

Output:

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