In SAS, there is no **power()** function. To perform exponentiation as well as find the roots of numbers in a SAS data step, you can use ******.

```
data have;
a = 10;
b = a**2;
put b=;
run;
/* Output */
b=100
```

SAS allow us to perform many different kinds of calculations in our code easily.

One such calculation is exponentiation of numbers to square, cube, take a number to the 5th, etc, or find roots of a number with fractional powers.

We can use the SAS ****()** operator to do exponentiation.

Let’s say we have the following code which creates a SAS dataset with some numbers.

```
data data;
input num;
datalines;
4
16
5
-2
3
-10
;
run;
```

Below are some examples of how to use ****** in a data step.

```
data data_with_powers;
set data;
square = num**2;
cube = num**3;
square_root = num**(1/2);
run;
```

This results in the following SAS dataset:

```
num square cube square_root
1 4 16 64 2
2 16 256 4096 4
3 5 25 125 2.2360679775
4 -2 4 -8 .
5 3 9 27 1.7320508076
6 -10 100 -1000 .
```

## How to Square a Number in a SAS Data Step

If you want to square a number in a SAS data step, you can use ****** and put a ‘2’ after the ******.

Below is an example of how you can square a number in SAS.

```
data have;
a = 10;
b = a**2;
put b=;
run;
/* Output */
b=100
```

## How to Find the Square Root of a Number in a SAS Data Step

If you want to find the square root of a number in a SAS data step, you can use ****** and put a ‘1/2’ after the ******.

Below is an example of how you can find the square root of a number in SAS.

```
data have;
a = 100;
b = a**(1/2);
put b=;
run;
/* Output */
b=10
```

Hopefully this article has been useful for you to learn how to use ****** in SAS to perform exponentiation and find roots in a SAS data step.

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