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+--- Thread: Inputting a string. (/thread-18043.html)
Inputting a string. - matalog - 02-16-2022 09:11 PM
Is there a way to have an INPUT variable recognised as a string?
I was writing a program that required the leading zeros to be retained and thought that if I could input it as a string, then I could manipluate it the way I want earlier.
If I input 07021999 as a number variable, then it becomes 7021999 instantly.
Also, if I just had to input a name for example, obviously it would just be useful to be able to input letters instead of numbers.
RE: Inputting a string. - toml_12953 - 02-16-2022 09:44 PM
(02-16-2022 09:11 PM)matalog Wrote: Is there a way to have an INPUT variable recognised as a string?
I was writing a program that required the leading zeros to be retained and thought that if I could input it as a string, then I could manipluate it the way I want earlier.
If I input 07021999 as a number variable, then it becomes 7021999 instantly.
Also, if I just had to input a name for example, obviously it would just be useful to be able to input letters instead of numbers.
INPUT({{A1,[2]}})
will expect a string for variable A1. The [2] determines the datatype of string. [-1] means all types are allowed. See the manual for other types.
RE: Inputting a string. - Guenter Schink - 02-16-2022 10:00 PM
Yes it is possible, also described if you put INPUT on the command line and press help. But I have to admit, that it is not so easy to be understood.
Code:
Syntax:
INPUT(var,[“title”], [“label”], [“help”], [reset_value], [initial_value])
INPUT({vars},[“titles”], [{“labels”}], [{“helps”}], [{reset_values}], [{initial_values}])
var -> {var_name, real, [{pos}]}
var -> {var_name, [allowed_types_matrix], [{pos}]}
var -> {var_name, {choose_items}, [{pos}]}For your required input you need the second more complex form. Don't worry it's not overly complicated.
- First of all you have to create a variable that will receive your INPUT as the standard variables "A" through "Z" don't accept strings.
- Type 123 or anything else then touch [Sto>] and enter e.G. MyVar, the Prime will ask you "Do you want to create a variable called MyVar" once you press OK, you have what you need to work with.
- INPUT({{MyVar,[2]}})
You may of course add some bells and whistles, but start it simple
HTH Günter
RE: Inputting a string. - matalog - 02-16-2022 11:35 PM
That's great thanks guys. I don't realy understand how you got all of that information from the Help entry on the calc.
Where are the various allowed types identifier numbers listed? I can see that -1 will allow all, but where does it state that type 2 will be a definite string?
RE: Inputting a string. - Guenter Schink - 02-16-2022 11:54 PM
(02-16-2022 11:35 PM)matalog Wrote: That's great thanks guys. I don't realy understand how you got all of that information from the Help entry on the calc.
Where are the various allowed types identifier numbers listed? I can see that -1 will allow all, but where does it state that type 2 will be a definite string?
Help is your help
..not always but..Toolbox ,"Type" help et Voilà
Günter
RE: Inputting a string. - toml_12953 - 02-17-2022 02:36 AM
(02-16-2022 11:35 PM)matalog Wrote: That's great thanks guys. I don't realy understand how you got all of that information from the Help entry on the calc.
Where are the various allowed types identifier numbers listed? I can see that -1 will allow all, but where does it state that type 2 will be a definite string?
Page 657 of the User Guide has all the types:
Code:
TYPE
Syntax: TYPE(object)
Returns the type of the object:
0: Real
1: Integer
2: String
3: Complex
4: Matrix
5: Error
6: List
8: Function
9: Unit
14.?: cas object. The fractional part is the cas type.RE: Inputting a string. - Arno K - 02-17-2022 02:45 PM
Not to forget the manual: https://www.hpcalc.org/prime/docs/hpprimeug.zip . It is a bit outdated but still helpful.
Arno