C++ | Beginning Functions > Using math library functions | Lecture 4

 Using Math Library Beginning Functions:

Here you will learn about Math Library Beginning Functions. Like

1. Cos
2. Sin
3. Tan
4. Sqrt
5. Pow
6. Log
7. And More

But here, I'll just discuss one function that is

sqrt function >> Square root function >> text with the √ symbol

In below given code, you will learn that
1st) You should add

#include <cmath>

into the header. It is mathematics library in C Plus Plus, in which you can find all important math functions.

double num2;
num2 = sqrt (num1);

Here I am taking the square root of num1 variable. likewise, you just need to try same functionality to all math type functions.

---

 /*  
  Name: beginning functions   
  Copyright: sameearticles.blogspot.com  
  Author: Samee Ullah Feroz  
  Date: 26/01/14 23:49  
  Description: Using Math library functions....  
 */  
 #include <iostream>  
 #include <cmath> //it is for all math functions library  
 int main() //it is actually a function here  
   {  
    using namespace std;  
    double num1;  
    cout << "pick your number...." << endl;  
    cin >> num1;  
    double num2;  
    num2 = sqrt(num1); // variable not in quotes  
    cout << "The square root of = " << num1 << " is " << num2 << endl;  
    system("pause");  
    return 0;  
   }  

Try it.

C++ | Beginning Functions > Using math library functions | Lecture 4 http://t.co/Z6VcSCimu0
— Quality Written Code (@QWCME) February 14, 2014