# 
## Overview

The **`sum()`** method returns the sum of all the atom values in the sequence supplied to it. It will accept atom values and sum them all up, returning an atom value that is the total of all the atom values.

## Syntax

```
sum(seq_to_sum, substring_escape)
```

## Parameters

* **`seq_to_sum`**: This is a sequence variable containing atom values that will be summed up.
* **`substring_escape`**: This is an optional datatype. This parameter is used to indicate what happens when a `substring` is part of the `seq_to_sum` parameter. Its default value is the global constant `ST_ALLNUM`.

  If `substring_escape` is set to the default value of `ST_ALL_NUM`, any substring will be considered an atom, but if the parameter is set to `ST_IGNSTR`—another global constant—the substring will be ignored.

## Return value

This function returns the sum of all atom values in the sequence.

## Example




include std/stats.e

    sequence seq1, seq2

    seq1 = {1,2,3,4,5,6,7,8,9}
    seq2 = {10,11,12}

    print(1, sum(seq1))
    puts(1,"\n")
    print(1, sum(seq2))
    puts(1,"\n")


    if sum(seq1) = sum(seq2) then
    printf(1,"they are equal")
  
    else 
    printf(1, "they are not equal")

    end if   



#    


## Explanation


* Line 1: We import the `stats.e` file in our code, because `sum()` is part of the library provided by this file.

* Line 3: We declare the variables, `seq1` and `seq2`.
* Lines 5 and 6: We assign values to `seq1` and `seq2`.

* Lines 8–10: We print the sums of `seq1` and `seq2`.

* Lines 9–11: We use `puts()` to print new lines so that our output could all print on new lines.

* Lines 14–20: We start and end an `if` statement block and check the equality of the sums of `seq1` and `seq2`.

What is the sum method in Euphoria?

Overview

Syntax

Parameters

Return value

Example

Explanation