INPUT variable

Pauses the program and waits for keyboard input. The entered text is echoed to the terminal and then stored in variable.

variable may be string, integer, or real.
If the input is not valid for the requested type (for example, letters when an integer is expected), the variable is set to 0.
INPUT is blocking: execution does not continue until the user presses Enter.

The INPUT statement is intentionally simple. For richer line-editing (cursor keys, history, etc.) see the ansi library, which also lets you manage your own I/O loop.

Remarks: Press CTRL+ESC at any time to cancel waiting for input.; Without an error handler, the program terminates.; With an ON ERROR handler, control passes there instead.

Examples

Read a number

PRINT "Enter a number:"
INPUT N
PRINT "You typed: "; N

Handle invalid numeric input

PRINT "Enter an integer:"
INPUT I
IF I = 0 THEN
    PRINT "That was not a valid integer (or it was zero)."
ELSE
    PRINT "OK: "; I
ENDIF

Read a string

PRINT "Enter your name:"
INPUT NAME$
PRINT "Hello, "; NAME$

Prompt until non-zero

REPEAT
    PRINT "Enter a non-zero value:"
    INPUT X
UNTIL X <> 0
PRINT "Thanks: "; X

Notes

The entered line is stored as-is for string variables (without the trailing newline).
For numeric variables, parsing is strict; invalid input yields 0.
INPUT echoes characters to the terminal. For full-screen UI or advanced editing, prefer the ansi library.