Math library

Streem standard library contains built-in functions that correspond to the C standard.

Constant values

PI - π

The mathematical constant π = 3.141592…, to available precision.

# Output: 3.1415926353898
print(PI)

E - e (Euler’s number)

The mathematical constant e = 2.718281…, to available precision.

# Output: 2.718281828459
print(E)

Number-theoretic and representation functions

ceil(x) - ceiling function

Computes the smallest number not less than x.

# Output: 46
print(ceil(45.54))

fabs(x) - absolute function

Computes the absolute value of x.

# Output: 2
print(fabs(-2))

gcd(x, y) - greatest common divisor function

Computes the greatest common divisor of the integers x and y.

Output: 2
print(gcd(4,10))

trunc(x) - truncation function

Computes the real value x truncated to an integer.

Output: 9
print(trunc(9.13))

int(x) - alias for the truncation function

Same as trunc(x).

floor(x) - floor function

Computes the largest number not greater than x.

# Output: 2
print(floor(2.7))

round(x) - round to nearest integer, away from zero

Return the rounding of x.

# Output: 10
print(round(9.76))

frexp(x, y) - convert floating-point number to fractional and integral components

Decompose x into mantissa and exponent. y is the exponent.

# Output: 0.512500
print(frexp(16.4,5))

ldexp(x, y) - multiply floating-point number by integral power of 2

Return the power y of x times 2. (x * (2 ^ y))

# Output: 6.00000
print(ldexp(6,3))

Trigonometric functions

sin(x) - sine function

Return the sine of x.

cos(x) - cosine function

Return the cosine of x.

tan(x) - tangent function

Return the tangent of x.

asin(x) - arc sine function

Return the arc sine of x.

acos(x) - arc cosine function

Return the arc cosine of x.

atan(x) - arc tangent function

Return the arc tangent of x.

hypot(x, y) - Euclidean distance function

Return the sqrt(x * x + y * y) (Euclidean norm).

# Output: 5
puts(hypot(4, 3))

Hyperbolic functions

asinh(x) - inverse hyperbolic sine function

Return the inverse hyperbolic sine of x.

acosh(x) - inverse hyperbolic cosine function

Return the inverse hyperbolic cosine of x.

atanh(x) - inverse hyperbolic tangent function

Return the inverse hyperbolic tangent of x.

cosh(x) - hyperbolic cosine function

Return the hyperbolic cosine of x.

sinh(x) - hyperbolic sine function

Return the hyperbolic sine of x.

tanh(x) - hyperbolic tangent function

Return the hyperbolic tangent of x.

logarithmic functions

exp(x) - base-e exponential function

Return e raised to the power x.

log(x) - natural logarithmic function

Return the natural logarithm of x.

log2(x) - base-2 logarithmic function

Return the base-2 logarithm of x.

log10(x) - base-10 logarithmic function

Return the base-10 logarithm of x.

Power functions

pow(x,y) - power functions

Return x raised to the power y.

# Output: 36
puts(pow(6, 2))

sqrt(x) - square root function

Return the square root of x.

# Output: 6
puts(sqrt(36))