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# polar() function for complex number in C++

• Difficulty Level : Expert
• Last Updated : 10 Oct, 2018

The polar() function for complex number is defined in the complex header file.The polar function is used to find the complex number from phase angle and magnitude.

Syntax:

```polar(mag, angle)
```

Parameter:

• mag: It represents the magnitude of the complex number.
• angle: It represents the phase angle.

Returns: This function returns a complex number which is obtain by phase angle and magnitude.

Below program illustrate the above function:-

Program 1:

 `// C++ program to demonstrate``// example of polar() function.``#include ``using` `namespace` `std;``  ` `// driver function``int` `main ()``{``  ``cout << ``"The complex number whose magnitude is 4.0"``;``  ``cout << ``" and phase angle 1.5"``;``  ` `  ``// use of polar() function``  ``cout << ``" is "` `<< polar (4.0, 1.5) << endl;``  ` `  ``return` `0;``}`
Output:
```The complex number whose magnitude is 4.0 and phase angle 1.5 is (0.282949,3.98998)
```

Program 2:

 `// C++ program to demonstrate``// example of polar() function.``#include ``using` `namespace` `std;``  ` `// driver function``int` `main ()``{``  ``cout << ``"The complex number whose magnitude is 2.0"``;``  ``cout << ``" and phase angle 0.5"``;``  ` `  ``// use of polar() function``  ``cout << ``" is "` `<< polar (2.0, 0.5) << endl;``  ` `  ``return` `0;``}`
Output:
```The complex number whose magnitude is 2.0 and phase angle 0.5 is (1.75517,0.958851)
```
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