Complex sentence: An issue with signed and unsigned numbers is also when attempting to cast (See Type conversion) one number into another with different signedness as this can potentially cause data loss due to the range of numbers for a signed integer differing to that of an unsigned integer.
Split into simpler sentences: An issue with signed and unsigned numbers is also when attempting to cast (See Type conversion) one number into another with different signedness. This can potentially cause data loss as the range of numbers a signed integer can store differentiates from that of an unsigned integer.