Any steps before the first label are numbered with four digits, but these steps cannot be targeted. The HP 35s has been given a retro look reminiscent of classic HP calculators from the 1970s to the 1990s. [5][2][12] While welcoming the improved handling of complex numbers compared to the 33s, the incomplete support for them has been criticised. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator). [10][5] Shortcomings which have been identified include the lack of any facility for communication with a computer (for loading and saving programs and data),[10][11] and sluggish performance. In the case of solving, the program is treated as an expression whose return value (the value left on the stack) should be zero. Subsequent insertion or deletion of steps in program space results in the automatic correction of GTO/XEQ instructions to reflect changes to the targeted step numbers. There are no functions for extracting real and imaginary parts, though that can be worked around, using the formulas Re = r cos Θ and Im = r sin Θ. For example, in the US, it is the most powerful programmable calculator approved for use in the Fundamentals of Engineering (FE) and Principles and Practice of Engineering (PE) examinations.[14]. Level X appears on the lower line of the display and level Y on the upper line. The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. Program keystrokes are fully merged: functions accessed via shift keys or menus are recorded as one keystroke, not two or more. The 35s stores complex numbers as single values, which can then be operated on in the standard ways. It can process a set of one-variable or two-variable statistics. The display also sports a variable contrast feature, turning it into ideal to utilize both outside and inside. [9][10] Particular mention has been made of the traditional HP feel of the keyboard with a big ↵ Enter key back in its traditional place. Complex numbers can be entered in either rectangular form (using the i key) or polar form (using the Θ key), and displayed in either form regardless of how they were entered. HP have published program code for the 35s which enables this.[17]. Base-e (natural) logarithms and exponentiation can be used, but not base-10. Additionally, it comes with a large, two-line alphanumeric display to examine entries, results, menus, as well as prompts effortlessly. With only 26 labels, it was difficult to write programs making use of the entire 30 KB of memory. There are no functions to directly extract the parts of the displayed fraction. An equation may be processed in a number of ways. - Automatic power off, - Robust and economical scientific calculator Calculated results include means, weighted mean, standard deviation, and linear regression figures. The summation registers are also accessible for further calculations. Scientific projects require accuracy, functionality and dependability for success. Attempting to read a non-allocated variable results in an error. The maximum denominator may be specified using the /c function. Program steps occupy three bytes. ", "HP 35s scientific calculator - User Guide", "Tear Down: Scientific calculator boils design down to two ICs", "Review: HP 35s Programmable Scientific Calculator", American Society for Engineering Education, "HP 33s Scientific Calculator User's Guide", "HP 35s: Indirect register data packing program", "Programming and Working with Indirectly Addressed Memory on the HP 35s", https://en.wikipedia.org/w/index.php?title=HP_35s&oldid=976151367, Creative Commons Attribution-ShareAlike License, 158 × 82 × 18.2 mm (6.22 × 3.23 × 0.72 in), Start with the number 1 placed in stack register X, Recall N (memory), placed in X the stack moves up and then multiply two lowest stack registers, End of program - result is in x (stack) and displayed, Over 800 memory registers (26 directly labelled), Operation in decimal, binary, octal, hexadecimal, Equation solver with arbitrary variable isolation (first seen on the, Support for input and display of fractions, Unit conversions and table of physical constants. Pocket-sized and full-featured, the HP 33s Scientific Calculator is designed for engineers, surveyors, college students, scientists, and medical … Efficiencies may be made by reducing the display precision and ensuring enough memory is available. The ABS function will return a vector's magnitude. The existing values of the other variables are used, unless the program contains INPUT instructions to make the program prompt for a value. For example, the principal square root of 9 is 3, which is denoted by √9 = 3, because 32 = 3 • 3 = 9 and 3 is nonnegative. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator).

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