Returns true if x is true or y is true.
Examples
Integer s=4,d=8;
      Integer f=6;
      if ( f>s || f>d )
      {
      return "abc";
      }
if ((@"Annual Sales" > 50000) ||(@"Annual Sales"<0)) then 
    "Customer needs attention" 
    else 
    "Normal customer"Returns true if x is true and y is true.
Examples
Integer s=4,d=8;
Integer f=6;
if ( f>s && f<d )
{
return "abc";
}
if ((@"Annual Sales" <3000) && (@Customers_Country=="USA")) then 
"Customer is in the USA and Annual Sales is less than 3000" 
else 
"Others" Returns true if x is false.
Example
The return value of the following statement is def.
Integer s=4, d=8;
Integer f=6;
if ( ! ( f>s ) )
return  "abc"
else
return "def"