## Program to find the surface area of the sphere

The sphere can be defined as the round 3D object having a string of points located at a uniform distance from a particular point called center. It is perfectly symmetrical and has no edges or vertices.

A sphere with radius r has a volume of (4/3) x pie x radius2 and a surface area of 4 x pie x r2.

### Formula

```Surface area of sphere =   4 x pie x r2
```

### Algorithm

1. Define the radius of the sphere.
2. Define the value of pie.
3. Calculate the surface area of the sphere by 4 x pie x (radius x radius).
4. Define surface_sphere and assign the surface area of the sphere to it.

O(1)

### C Program

Output:

```Surface area of the sphere=17210.285714
```

### PHP Program

Output:

```Surface area of sphere=17210.285714301
```

### Java Program

Output:

```Surface area of sphere=17210.28571430136
```

### C# Program

Output:

```Surface area of sphere=17210.2857143014
```

### Python Program

Output:

```Surface area of the sphere=17210.28571430136
```

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