Split the string length with limit

 To split the string length with limited 

CustTable   custTable;

    str         fullInvoiceNum, requiredTextInvoice, splitInvoice ,Invoice, staticText ="Payment of Invoice";

    int         i=1,j=1;

    while select custTable

    {

       fullInvoiceNum +=  custTable.name();

    }

    requiredTextInvoice = staticText + fullInvoiceNum;

    while (j < strLen(requiredTextInvoice))

    {

        if(i==1)

        {

           splitInvoice = subStr(requiredTextInvoice,j,35);

           Invoice = splitInvoice;

            j = 3;

        }

        else

        {

            splitInvoice = subStr(requiredTextInvoice,j,33);

            Invoice = " _" + splitInvoice;

        }

        j = j + 33;

        info(strFmt("%1  %2", Invoice, strLen(Invoice) ));

        i++;

    }