how to validate if the text in edit has numbers in and to show a message if it has in delphi
// Taking OP question obsessively literally, this
// function doesn't allow negative sign, decimals, or anything
// but digits
function IsValidEntry(s:String):Boolean;
var
n:Integer;
begin
result := true;
for n := 1 to Length(s) do begin
if (s[n] < '0') or (s[n] > '9') then
begin
result := false;
exit;
end;
end;
end;how to check if something is only numbers in delphi
if TryStrToInt(Edit1.Text, Value) then
DoSomethingWithTheNumber(Value)
else
HandleNotANumberError(Edit1.Text);Copyright © 2021 Codeinu
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