p n

Really simple input

Droid Calc knows about precedence rules.

The following examples use a shorter notation.

Instead of 10.25 you would type 10.25.

Droid Calc accepts algebraic (infix) and old-style input methods. You can set the input method to be used on the settings menu.

Number input

Category	Example		Input
rational numbers	0.3		.3 or 0.3
negative numbers	-4.7		4.7+/-
exponential notation	3×102	(=300)	3EXP2
	-5.2×103	(=-5200)	5.2+/-EXP3
	-8.3×10-4	(=-0.00083)	8.3+/-EXP4+/-
pi	π	(=3.141592653...)	EXP
fractions	2/3	(=0.666666...)	2a b/c3
	5 1/4	(=5.25)	5a b/c1a b/c4
degrees	5° 20' 30"	(=5.341666...)	5° ' "20° ' "30° ' "

Functions 1

argumentfunction

For these functions you enter the argument followed by the function key.

	Function	Example	Input	Display
1/x	Reciprocal	2-1 = 0.5	21/x=	0.5
x2	Square	32 = 9	3x2=	9.
x!	Factorial	3! = 6	3SHIFTx!=	6.

Functions 2

Droid Calc comes with 2 input methods: algebraic (infix) and old-style. You can set the input method to be used on the settings menu.

algebraic (infix) input method

functionargument

Modern scientific calculators often use algebraic (infix) input method.

For these functions you press the function key followed by the argument if the input method is set to algebraic (infix).

	Function	Example	Display
√	Square root	√9 = 3 √9=	3.
3√	Cube root	3√27 = 3 SHIFT3√27=	3.
log	Common logarithm	log 100 = 2 log100=	2.
10x	Powers of 10	102 = 100 SHIFT10x2=	100.
ln	Natural logarithm	ln 10 = 2.302585093 ln10=	2.302585093
ex	Powers of e	e2.302585093 = 10 SHIFTex2.302585093=	10.
sin cos tan	Sine, cosine, tangent	sin 30° = 0.5 sin30=	0.5
sin-1 cos-1 tan-1	Arc sine, cosine, tangent	asin 0.5 = 30° SHIFTsin-1.5=	30.
hypsin hypcos hyptan	Hyperbolic sine, cosine, tangent	sinh 5 = 74.20321058 hypsin5=	74.20321058
hypsin-1 hypcos-1 hyptan-1	Inverse hyperbolic sine, cosine, tangent	sinh-1 74.20321058 = 5 SHIFThypsin-174.20321058=	5.

old-style input method

argument function

Older, more basic calculators often use this input method.

For these functions you enter the argument first and then press the function key if the old-style input method is set.

	function	example	display
√	Square root	√9 = 3 9√=	3.
3√	Cube root	3√27 = 3 27SHIFT3√=	3.
log	Common logarithm	log 100 = 2 100log=	2.
10x	Powers of 10	102 = 100 2SHIFT10x=	100.
ln	Natural logarithm	ln 10 = 2.302585093 10ln=	2.302585093
ex	Powers of e	e2.302585093 = 10 2.302585093SHIFTex=	10.
sin cos tan	Sine, cosine, tangent	sin 30° = 0.5 30sin=	0.5
sin-1 cos-1 tan-1	Arc sine, cosine, tangent	asin 0.5 = 30° .5SHIFTsin-1=	30.
hypsin hypcos hyptan	Hyperbolic sine, cosine, tangent	sinh 5 = 74.20321058 5hypsin=	74.20321058
hypsin-1 hypcos-1 hyptan-1	Inverse hyperbolic sine, cosine, tangent	sinh-1 74.20321058 = 5 74.20321058SHIFThypsin-1=	5.

Functions with two arguments

argument 1functionargument 2

	function	example	display
xy	Powers	23 = 8 2xy3=	8.
x√	Roots	7√128 = 2 7SHIFTx√128=	2.
nPr	Permutations	6 nPr 3 = 120 6SHIFTnPr3=	120.
nCr	Combinations	6 nCr 3 = 20 6SHIFTnCr3=	20.
R→P	Rectangular to polar coordinate conversion	x=3, y=4: 3 RP 4 = 5 (r), 53.13010235 (θ) 3SHIFTR→P4=	r = 5.
		SHIFTx ↔ y	θ = 53.13010235
P→R	Polar to rectangular coordinate conversion	r=2, θ=60: 2 PR 60 = 1 (x), 1.732050808 (y) 2SHIFTP→R60=	x = 1.
		SHIFTx ↔ y	y = 1.732050808

Percentage calculations

You can set the kind of percentage calculation to be used on the settings page (gear in top right corner).

Percentage calculations - advanced

Modern scientific calculators often use this kind of percentage calculation. The advanced percentage calculation answers several questions easily.

Percentage calculations - simple

Basic calculators come often with this kind of percentage calculation.

example	input	display
200 + 19% = 238	200+19SHIFT%=	238.
238 - 19% = 192.78	238-19SHIFT%=	192.78
200 ÷ 50% = 2	200÷50SHIFT%=	2.
200 × 50% = 20000	200×50SHIFT%=	20000.