Argox PA-20 Basic Programming Manual Manuel d'utilisateur télécharger pdf (Page 24)

PT-Basic Programming Manual Ver. 1.00 23/143

3.4 Commands for string processing

LEN

Purpose：

To return the length of a string.

Syntax：

A% = LEN(S$)

Example：

Str$="ABCDEFGHIJK"

L% = LEN(Str$)

PRINT "Len. = ",L%

Description：

A% is an integer variable to be assigned to the result.

S$ may be a string variable, string expression, or string

constant.

INSTR

Purpose：

To search if one string exists inside antoher one.

Syntax：

A% = INSTR([N%,] S1$, S2$)

Example：

Str$="ABCGEFGHIJK"

G$="GH"

PRINT INSTR(5,Str$, G$)

PRINT INSTR(3, Str$, "CGE")

Description：

A% is an integer variable to be assigned to the result.

N% is a numeric expression. Optional offset N% sets the

position for starting the search.

S1$, S2$ may be a string variable, string expression, or string

constant.

If S2$ is found in S1$, it returns the position of the first

occurrence of S2$ in S1$, from the starting point.

If N% is larger than the length of S1$ or if S1$ is null, of if

S2$ cannot be found,it return 0.

If S2$ is null,it return N%(or 1 if N% is not specified).

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Argox PA-20 Basic Programming Manual Manuel d'utilisateur Page 24