Given a radius of circle , we have to find the area of circle and print the area of circle.
So what is area of circle ?
area of circle is 3.14 * radius * radius;
Example:
Input:5
Output:78.5
Logic:
STEP 1: radius r of circle. is given already. we have to find the area
STEP 2:area=3.14*r*r;
STEP 3:print the area
Code
#include<bits/stdc++.h> using namespace std; int main() { cout<<"enter radius "<<endl; double r; cin>>r; double area=3.14*r*r; cout<<"area" << " "<<area<<endl; }
Ouput:
5 78.5
Time Complexity:O(N)
Space Complexity:O(1)