# How to get the number of entries in a Lua table?

While there are many functions and operators that we can use to get the size of the integer entries in a particular table in lua, there's no defined method or function which works for a table that contains data that is not homogeneous in nature.

Let’s consider a simple table where we have integer values stored in it, then we will use two most common approaches to find the number of entries in that table.

## Example

Consider the example shown below −

Live Demo

t = {}
t = 1
t = 2
t = 3
t = 4
print(#t)

## Output

4

But let’s take the case where instead of having the homogenous data in the table, the data is not of the same type, then in that case the # operator will result in inconsistency.

## Example

Consider the example shown below −

Live Demo

t = {}
t["yes"] = 1
t = 1
t = 2
t = 3
print(#t)

## Output

3

As we can clearly see, that the output yields an inconsistency, hence we have no choice but to write our own function to calculate the number of entries present in the table.

## Example

Consider the code shown below −

Live Demo

t = {}
t["yes"] = 1
t = 1
t = 2
t = 3
print(#t)
function tablelength(T)
local count = 0
for _ in pairs(T) do count = count + 1 end
return count
end
print(tablelength(t))

## Output

3
4