The function package “Cross Sum” provides various functions for the calculation of around the topic cross sum.

• Cross sum calculates the cross sum, iterated cross sum, alternating cross sum, cross product etc. of the entered number.
• Cross sum in range lists all numbers in a range with a given cross sum.
• Iterated cross sum in range lists all numbers in a range with a specific iterated cross sum.
• Frequency of cross sums in range determines which cross sums occur how often in a range.
• Frequency of iterated cross sums in range determines which iterated cross sums occur how often in a range.