input
prompts the user for keyboard input
Syntax
x = input(message) x = input(message, "string")
Arguments
- message
character string: the inline prompting message. Extended UTF-8 characters are supported.
- "string"
optional flag, to return the input as is, as a literal string in
x
.- x
- without
"string"
:x = evstr(keyboard_input)
- With "string":
x = keyboard_input
- without
Description
x = input(message)
- prints the
message
on a new line; - sets the caret at the message's end;
- waits for a direct literal
keyboard_input
of any length, + enter.keyboard_input
must be a valid Scilab expression provided on the current line, without continuation mark..
.keyboard_input
can include extended UTF-8 characters. - tries to evaluate
x = evstr(k_input)
:- If it succeeds,
x
is output. - Otherwise: an error is displayed, and the user is prompted again until a valid Scilab expression is entered.
- If it succeeds,
keyboard_input
is empty or made of blanks, x
is set to
[]
.
x = input(message, "string") always sets
x
to the literal keyboard_input
considered as a string, possibly empty ""
.
Examples
maxIter = input("Max number of iterations: ") // enter 300 δ = 1e-6; tol = input("Tolerance: ") // enter nothing or blanks tol = input("Tolerance: ") // enter 7*δ f = input("Function: "); // enter sin f == sin f(5) s = "ABC"; r = input("Expression: ") // enter s + "D" res = input("Invalid expression: ") // enter s/4
--> maxIter = input("Max number of iterations: ") // enter 300 Max number of iterations: 300 maxIter = 300. --> δ = 1e-6; --> tol = input("Tolerance: ") // | = caret before enter Tolerance: | tol = [] --> tol = input("Tolerance: ") // enter 7*δ Tolerance: 7*δ tol = 0.000007 --> f = input("Function: "); // enter sin Function: sin --> f == sin ans = T --> f(5) ans = -0.9589243 --> s = "ABC"; --> r = input("Expression: ") // enter s + "D" Expression: s + "D" r = "ABCD" --> res = input("Invalid expression: ") // enter s/4 Invalid expression: s / 4 Undefined operation for the given operands. check or define function %c_r_s for overloading. Invalid expression:
The "string"
option returns the input string as is,
with leading and trailing white spaces. Extended characters are accepted:
x = input("Prénom (surname): ","string") // enter André
--> x = input("Prénom (surname): ","string") // | = caret before enter Prénom (surname): André | x = " André "
See also
- x_dialog — Dialog for interactive multi-lines input.
- x_mdialog — Dialog for interactive vector/matrix input.
- x_choose — interactive window choice (modal dialog)
- x_choices — interactive Xwindow choices through toggle buttons
- x_matrix — Edits a matrix and waits for validation (modal)
- evstr — вычисление выражений
History
Версия | Описание |
6.0.0 | In case where nothing is entered with the "string" option, input returns an empty string instead of a space. |
Report an issue | ||
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