why p%10 is 9.0000000001 while it should be 9 only????? Can someone please help....

Question

since % give remainder p%10 should be 9 but it is not..
https://code.sololearn.com/cAL64z3n6twb/?ref=app

Answer 1

because long binary decimal numbers are cut to 64 bit numbers and it causes small difference

Answer 2

Use integral type rather than floating point type if you don't want the fractional part of the number. Note that type casting may be necessary.