How do you sum all the elements in an array?

To sum all the elements in an array, you can use a loop to iterate over the elements in the array and add each element to a running total. Here is an example in pseudo-code:

total = 0
for each element in array:
  total = total + element

Alternatively, you can use the built-in sum() function in some programming languages to automatically calculate the sum of all the elements in an array. For example, in Python you could use the following code:

total = sum(array)

In both cases, the total variable would be assigned the sum of all the elements in the array.