# C# Program - Power of a Number

If power (or exponential) of number indicates how many the number is multiplied by itself to get the final number. For example:

x raised to the power 2 = x² = x*x

x raised to the power 3 = x³ = x*x*x

### Method 1: Using conditional statement

In the example below, a method called Power() is created to calculate power of a number. It uses while loop to achieve this. This method can be used to calculate the power of a number where power should be a non-negative integer.

```using System;

class MyProgram {
static void Power(double x, int n) {
double finalnum = 1;
int n1 = n;

while(n1 > 0){
finalnum = finalnum * x;
n1--;
}
Console.WriteLine(x + " raised to the power " + n + " = " + finalnum);
}

static void Main(string[] args) {
Power(3, 5);
Power(5, 0);
Power(6, 2);
}
}
```

The above code will give the following output:

```3.0 raised to the power 5 = 243.0
5.0 raised to the power 0 = 1.0
6.0 raised to the power 2 = 36.0
```

### Method 2: Using pow() method of C# Math class

The pow() method of C# Math class can also be used to calculate power of a number. It can be used to calculate xn for any value of n (n can be negative or fraction).

```using System;

class MyProgram {
static void Main(string[] args) {
double x = 3, y = 5, z = 6;
double a = 5, b = 0, c = 2;

Console.WriteLine(x + " raised to the power " + a + " = " + Math.Pow(x, a));
Console.WriteLine(y + " raised to the power " + b + " = " + Math.Pow(y, b));
Console.WriteLine(z + " raised to the power " + c + " = " + Math.Pow(z, c));
}
}
```

The above code will give the following output:

```3.0 raised to the power 5.0 = 243.0
5.0 raised to the power 0.0 = 1.0
6.0 raised to the power 2.0 = 36.0
```

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