# SQRT Function

Returns the square root of a positive number

Returns the square root of a positive number

The SQRT Function is a Math and Trigonometry function. It will provide the square root of a positive number. The function was introduced in MS Excel 2010.

**=SQRT(number)**

The SQRT function uses the following argument:

**Number**(required argument) – It is the number for which we wish to find out the square root. It must be a positive number, an Excel formula, or a function that results in a positive number.

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To understand the uses of the SQRT function, let’s consider a few examples:

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Suppose we wish to find the square root of the following numbers:

- 25
- 49
- 900
- 121
- 100

The formula used would be =SQRT(reference). We will get the following results:

If a number provided by a user is negative, the SQRT function will return the #NUM! error. The square root of a negative number does not exist among the set of real numbers. It is because there is no way to square a number and get a negative result.

However, if we wish to take the square root of a negative number as if it were a positive number, we need to use the ABS function. We will wrap the source number in the ABS function, which will return the absolute value of a number and ignore the sign of the given number:

Suppose we are given the data below:

To find the SQRT, we will use the formula =SQRT(ABS(ref)), as shown below:

We get the result below:

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- #NUM! error – Occurs when the supplied number argument is negative.
- The SQRT function, depending on the user’s requirement, can be used along with the ABS, ROUND, ROUNDUP, and ROUNDDOWN functions.
- SQRT is similar to the POWER function. However, the POWER function works like an exponent in a standard math equation. For example, for the number 25, we will provide the formula
**=SQRT(25)**and**=POWER( 25, 1/2)**.

**Click here to download the sample Excel file**

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