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Chapter 14. Statement Reference

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I/O statement

READ

Reads data defined by DATA statement(s) and assigns them to variables.

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Syntax:

Syntax:Syntax:

Syntax:

READ variable[,variable...]

Parameter:

Parameter:Parameter:

Parameter:

variable

A numeric or string variable.

Description:

Description:Description:

Description:

READ reads as many data values as necessary in turn from data stored by DATA

statement and assigns them, one by one, to each variable in the READ statement.

• If the data type of a read value does not match that of the corresponding variable, the

following operations take place so that no run-time error occurs:

- Assigning a numeric data to a string variable:

The READ statement converts the numeric data into the string data type and then

assigns it to the string variable.

Statement example: DATA 123

READ a$

PRINT a$

Output:

123

- Assigning a string data to a numeric variable:

If the string data is valid as numeric data, the READ statement converts the string data

into the numeric data type and then assigns it to the numeric variable.

Statement example: DATA "123"

READ b

P PRINT b

Output:

123

1 2 ... 276 277 278 279 280 281 282 283 284 285 286 ... 586 587

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