Beginning Math Functions

We are going to use another library <cmath>

Then we can use all math related library provided by C++

#include <iostream>

#include <cmath>

int main()

{

using namespace std;

double num1;    //real number in c++

cout<<"Pick your number.."<<endl;

cin>>num1;    //get value from user

double num2;    //doesn't have a value yet;

num2 = sqrt(num1);    //a basic math function square root, num1 is an argument

//some functions have arguments more than one.

cout<<"The square root of variable "<<num1<< " is "<<num2<<endl;

//let's use another function pow()

num1 = pow(2.0, 4.0); //16 = 2^4

//random number

num1 = rand();    //you don't need any argument; automatically assigned

cout<<num1<<endl;

system("pause");

}