Line Input statement - MapBasic - 2023

Purpose

Reads a line from a sequential text file into a variable.

Syntax

Line Input [#] filenum, var_name

filenum is an integer value, indicating the number of an open file.

var_name is the name of a string variable.

Description

The Line Input statement reads an entire line from a text file, and stores the results in a string variable. The text file must already be open, in Input mode.

The Line Input statement treats each line of the file as one long string. If each line of a file contains a comma-separated list of expressions, and you want to read each expression into a separate variable, use the Input # statement instead of Line Input.

Example

The following program opens an existing text file, reads the contents of the text file one line at a time, and copies the contents of the file to a separate text file.

Dim str As String
Open File "original.txt" For Input As #1 
Open File "copy.txt" For Output As #2
	Do While Not EOF(1)
		Line Input #1, str
		If Not EOF(1) Then 
			Print #2, str
		End If
	Loop 
Close File #1
Close File #2

See Also:

Input # statement, Open File statement, Print # statement