(20S) and (21S) Number of Days Since January 1 - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (/forum-10.html) +--- Forum: General Software Library (/forum-13.html) +--- Thread: (20S) and (21S) Number of Days Since January 1 (/thread-12999.html) (20S) and (21S) Number of Days Since January 1 - Eddie W. Shore - 05-20-2019 12:52 PM Days Since January 1 Calculate the number of days since January 1. For more information, please see: http://edspi31415.blogspot.com/2019/03/ti-84-plus-and-hp-41c-number-of-days.html Input: R1: day R2: month R3: 0 if we are working in a non-leap year, 1 if we are working in a leap year Output: R4: number of days since January 1 Program: Code: ``` 01 LBL A: 61,41,A 02 RCL 1:  22,1 03 STO 4: 21, 4 04 3:  3 05 5:  5 06 STO - 4:  21,65,4 07 RCL 2: 22,2 08  INPUT:  31 09  2:  2 10  x ≤ y?:  61,42 11  GTO 2:  51,41,2 12  RCL 2: 22,2 13  *:  55 14  3:  3 15  0:  0 16  . : 73 17 6:  6 18  +:  75 19  1:  1 20  .  : 73 21  6:  6 22  =:  74 23  IP:  51, 45 24  STO + 4:  21,75,4 25  RCL 3:  22,3 26  STO + 4:  21,75,4 27  RCL 4: 22,4 28  RTN:  61, 26 29  LBL 2:  61,41,2 30  RCL 2:  22,2 31   *:  55 32  3:  3 33  0:  0 34  .  : 73 35  6:  6 36  +:  75 37  3:  3 38  6:  6 39  8:  8 40:  .  : 73 41  8:  8 42 =: 74 43  IP:  51,45 44  STO + 4:  21,75,4 45  3:  3 46  6:  6 47  5:  5 48  STO - 4:  21,65,4 49  RCL 4:  22,4 50  RTN:  61,26``` Example 1: 1/1/2019 - 5/7/2019 (non-leap year) R1: 7, R2: 5, R3: 0 Result: R4 = 126 Example 2: 1/1/2020 - 11/14/2020 (leap year) R1: 14, R2: 11, R3: 1 Result: R4 = 318