Rounding to the Nearest Reciprocal - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (/forum-10.html) +--- Forum: HP Prime Software Library (/forum-15.html) +--- Thread: Rounding to the Nearest Reciprocal (/thread-9578.html) Rounding to the Nearest Reciprocal - Eddie W. Shore - 11-26-2017 09:10 PM The program ROUNDRCP rounds a number to the nearest 1/n. This function can come in handy in several applications, for example, when working with construction or measuring, when have to round results to the nearest eighth (1/8), inch (1/12) or sixteenth (1/16). Code: ```EXPORT ROUNDRCP(a,n) BEGIN // Round a to the nearest 1/n // 2017-11-21 EWS LOCAL w; w:=FP(ABS(a))*n; w:=ROUND(w,0); RETURN IP(a)+SIGN(a)*(w/n); END;``` Round π to the nearest 1/4: ROUNDRCP(π, 4): 3.25 = 13/4 Round e^2 to the nearest 1/100: ROUNDRCP(e^2, 100): 7.39 = 739/100 Round 1/4 + 2/7 + 3 1/3 to the nearest 1/16: ROUNDRCP(1/4 + 2/7 + 3 + 1/3, 16): 3.875 = 31/8 RE: Rounding to the Nearest Reciprocal - chromos - 11-28-2017 05:04 AM This is exactly the case that fits into user defined functions (when they will remember the variables checkboxes). PHP Code: `IP(A)+SIGN(A)*ROUND(FP(ABS(A))*N,0)/N ` [attachment=5363] Otherwise, very nice utility, Eddie! RE: Rounding to the Nearest Reciprocal - salvomic - 11-28-2017 08:30 AM (11-28-2017 05:04 AM)chromos Wrote:  ...very nice utility, Eddie! yes, thanks Eddie! Salvo RE: Rounding to the Nearest Reciprocal - Eddie W. Shore - 11-30-2017 01:55 PM Thank you Chromos and Salvo! RE: Rounding to the Nearest Reciprocal - Dieter - 12-01-2017 07:57 AM (11-28-2017 05:04 AM)chromos Wrote:  PHP Code: `IP(A)+SIGN(A)*ROUND(FP(ABS(A))*N,0)/N ` I do not own a Prime, so this may be a very dumb question, but is there a special reason why this can't be done with a simple ROUND(A*N,0)/N ? Dieter