IsNumeric 1

[steelydon]

Does Delphi 5 contain an equivalent to the VB "IsNumeric" function, or can anyone help with how I test whether a certain character in a string is a numeric or an alpha?

 

[BobbaFet]

hi steelydon,

What does IsNumeric do? Maybe I can help you then ...

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[svanels]

There are a number of ways to test it. One of them is the val procedure

for further information check out faq218-360 in the pascal-forum about strings


Val( TextVal, Number , Code) converts a string to a number.
If this is possible the result of code = 0, other wise code indicates the character where
the error occured

example:

Textval := '354';
Val(Textval, Number, Code) ---> Code = 0, Number = 354

Textval := '37645x2';
Val( Textval, Number, Code) ---> Code = 6, Number remains unchanged;

Regards
S. van Els
SAvanEls@cq-link.sr

 

[steelydon]

Thanks S. van Els - the Val procedure did the job