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6-3 Character Functions
(Location
[, Number
of
characters
J)
MID$
Numeric expression
Numeric expression
Function:
Fetches the specified number of characters from a specified location of the
exclusive character variable
($).
Parameter:
Location:
Number of characters:
Numeric expression. Values below the decimal point
are discarded.
1 S: location< 101
Numeric expression.
Values
below the decimal point
are discarded.
1 S: number of characters < 101.
When
omitted, all characters after the specified location are fetched.
Explanation:
1) Fetches a specified number of characters from a specified location of the
exclusive character variable ($).
2)
When the specified location is out of the character string, a null is obtained.
3) When the length of the character string after the specified location is smaller
than the specified number of characters, all the characters after the specified
location are fetched.
*MID$
can be abbreviated as MID.
Example:
10
$=~ABCDEFGHIJKLMNOPQRSTUVWXYZq
20
INPUT~location=q,M,~length=q,N
30 PRINT MID$<M,N>
40 GOTO 20
141

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