The output of your program must look exactly like this:

Properties of a Circle

Radius : $10\mathrm{.}25$

Diameter : $20\mathrm{.}5$

Circumference : $64\mathrm{.}40075$

Area : $330\mathrm{.}05384375$

Area of Semicircle : $165\mathrm{.}026921875$

Properties "Rounded" Down

Radius : $10$

Diameter : $20$

Circumference : $64$

Area : $330$

Area of Semicircle : $165$