Arithmetic
• if either operand long double, convert other to long double
• else if either is double, convert other to double
• else if either is float, convert other to float
• else convert char and short to int
• if either is unsigned long, convert other to unsigned long
• if one is unsigned int and the other long int, convert unsigned int to long int if it fits, otherwise convert both to unsigned long
• if either is long, convert other to long
• if either is unsigned, convert other to unsigned
• else both operands are int

Assignment
• value of right side converted to type of left