maths in javascript code example

Example 1: javascript math methods

abs(x)	Returns the absolute value of x
acos(x)	Returns the arccosine of x, in radians
acosh(x)	Returns the hyperbolic arccosine of x
asin(x)	Returns the arcsine of x, in radians
asinh(x)	Returns the hyperbolic arcsine of x
atan(x)	Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians
atan2(y, x)	Returns the arctangent of the quotient of its arguments
atanh(x)	Returns the hyperbolic arctangent of x
cbrt(x)	Returns the cubic root of x
ceil(x)	Returns x, rounded upwards to the nearest integer
cos(x)	Returns the cosine of x (x is in radians)
cosh(x)	Returns the hyperbolic cosine of x
exp(x)	Returns the value of Ex
floor(x)	Returns x, rounded downwards to the nearest integer
log(x)	Returns the natural logarithm (base E) of x
max(x, y, z, ..., n)	Returns the number with the highest value
min(x, y, z, ..., n)	Returns the number with the lowest value
pow(x, y)	Returns the value of x to the power of y
random()	Returns a random number between 0 and 1
round(x)	Rounds x to the nearest integer
sin(x)	Returns the sine of x (x is in radians)
sinh(x)	Returns the hyperbolic sine of x
sqrt(x)	Returns the square root of x
tan(x)	Returns the tangent of an angle
tanh(x)	Returns the hyperbolic tangent of a number
trunc(x)	Returns the integer part of a number (x)

Example 2: js maths

JS Numbers and Math:

Number Properties:
MAX_VALUE
The maximum numeric value representable in JavaScript
MIN_VALUE
Smallest positive numeric value representable in JavaScript
NaN
The “Not-a-Number” value
NEGATIVE_INFINITY
The negative Infinity value
POSITIVE_INFINITY
Positive Infinity value

Number Methods:
toExponential()
Returns a string with a rounded number written as exponential notation
toFixed()
Returns the string of a number with a specified number of decimals
toPrecision()
String of a number written with a specified length
toString()
Returns a number as a string
valueOf()
Returns a number as a number

Math Properties:
E Euler’s number
LN2 The natural logarithm of 2
LN10 Natural logarithm of 10
LOG2E Base 2 logarithm of E
LOG10E Base 10 logarithm of E
PI The number PI
SQRT1_2 Square root of 1/2
SQRT2 The square root of 2

Math Methods:
abs(x)
Returns the absolute (positive) value of x
acos(x)
The arccosine of x, in radians
asin(x)
Arcsine of x, in radians
atan(x)
The arctangent of x as a numeric value
atan2(y,x)
Arctangent of the quotient of its arguments
ceil(x)
Value of x rounded up to its nearest integer
cos(x)
The cosine of x (x is in radians)
exp(x)
Value of Ex
floor(x)
The value of x rounded down to its nearest integer
log(x)
The natural logarithm (base E) of x
max(x,y,z,...,n)
Returns the number with the highest value
min(x,y,z,...,n)
Same for the number with the lowest value
pow(x,y)
X to the power of y
random()
Returns a random number between 0 and 1
round(x)
The value of x rounded to its nearest integer
sin(x)
The sine of x (x is in radians)
sqrt(x)
Square root of x
tan(x)
The tangent of an angle

Example 3: math.js

// functions and constants
math.round(math.e, 3)                // 2.718
math.atan2(3, -3) / math.pi          // 0.75
math.log(10000, 10)                  // 4
math.sqrt(-4)                        // 2i
math.derivative('x^2 + x', 'x')      // 2*x+1
math.pow([[-1, 2], [3, 1]], 2)
     // [[7, 0], [0, 7]]

// expressions
math.evaluate('1.2 * (2 + 4.5)')     // 7.8
math.evaluate('12.7 cm to inch')     // 5 inch
math.evaluate('sin(45 deg) ^ 2')     // 0.5
math.evaluate('9 / 3 + 2i')          // 3 + 2i
math.evaluate('det([-1, 2; 3, 1])')  // -7

// chaining
math.chain(3)
    .add(4)
    .multiply(2)
    .done() // 14