Adding a sequence of inputted values

[billiam]

Godot Version

Godot 4

Question

Hi there! I’m currently working on a till system that in theory, would be able to add up a number of values that you input via an on-screen keypad.

The numbers you input would come up on the bottom and screen and would transfer to the top once added - I’m essentially using “Ent” as the + symbol and “Total” as the =

I’ve been able to add two numbers together via the following code:

func _on_ent_btn_pressed():
has_been_used = false
first_number = bottom_display.text.to_float()
top_display.text = str(first_number)

func _on_total_btn_pressed():
has_been_used = false
new_number = bottom_display.text.to_float()
result = first_number + new_number
top_display.text = str(result)

The trouble comes with adding another, or several, more numbers to the result. I know that using “first_number” and “second_number” limits me to be able to use more, but as the player would be putting any number of items through the till, I need a way for that to work.

Any help would be greatly appreciated, I am still quite new and could use all the advice I can get! Thank you!

[novaplusplus]

You’d want to use an Array (Array — Godot Engine (stable) documentation in English) to do this if I’m understanding your goal correctly - storing all the numbers together and then adding them all up in a loop.

for instance, something like:

number_array.append(new_number)

followed later by…

var sum = 0.0
for number in number_array:
    sum += number

[pennyloafers]

@billiam

func _on_ent_btn_pressed():
  has_been_used = false
  first_number = bottom_display.text.to_float()
  top_display.text = str(first_number)

just add a running total for your ent_btn_pressed

you can break it out into two readable steps or just add += to your text to float conversion

 var temp_number = bottom_display.text.to_float()
 first_number = first_number + temp_number
# or
 first_number += bottom_display.text.to_float()

These are the same thing.

just remember to zero out first_number after total is pressed and before you start.

[billiam]

That’s worked perfectly, thank you!! Couldn’t get my head around making a temporary value but it makes sense now

[billiam]

I’ve got it working thanks to pennyloafers but that does make arrays make more sense, thank you!