Larger integer to smaller unsigned type conversion in C

Question

I was goint through k & r. I was having problem in understanding following lines on page 197(section A6)

Integral conversions: any integer is co

Answer 1

It means only low value bits will be count and high order bits will be discarded.

For example:

01111111 11111111 11110000 00001111

when converted to a 16 bit unsigned short will be:

11110000 00001111

This is effectively mathematically expressed in:

target_value = value % (target_type_max+1)           ( % = modulus operator )