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数学函数
### ceil Rounds up to the next highest integer. Parameters: `number` - a floating point number. Returns: `integer` Example: `ceil(2.4)` Output: `3` ### floor Rounds down to the next lowest integer. Parameters: `number` - a floating point number. Returns: `integer` Example: `floor(2.6)` Output: `2` ### percentage Converts a floating point number into a percentage string. Parameters: `number` - a floating point number. Returns: `number` Example: `percentage(0.5)` Output: `50%` ### round Applies rounding. Parameters: - `number`: A floating point number. - `decimalPlaces`: Optional: The number of decimal places to round to. Defaults to 0. Returns: `number` Example: `round(1.67)` Output: `2` Example: `round(1.67, 1)` Output: `1.7` ### sqrt Calculates square root of a number. Keeps units as they are. Parameters: `number` - floating point number. Returns: `number` Example: `sqrt(25cm)` Output: `5cm` Example: `sqrt(18.6%)` Output: `4.312771730569565%` ### abs Calculates absolute value of a number. Keeps units as they are. Parameters: `number` - a floating point number. Returns: `number` Example #1: `abs(25cm)` Output: `25cm` Example #2: `abs(-18.6%)` Output: `18.6%` ### sin Calculates sine function. Assumes radians on numbers without units. Parameters: `number` - a floating point number. Returns: `number` Example: ```less sin(1); // sine of 1 radian sin(1deg); // sine of 1 degree sin(1grad); // sine of 1 gradian ``` Output: ```less 0.8414709848078965; // sine of 1 radian 0.01745240643728351; // sine of 1 degree 0.015707317311820675; // sine of 1 gradian ``` ### asin Calculates arcsine (inverse of sine) function. Returns number in radians e.g. a number between `-π/2` and `π/2`. Parameters: `number` - floating point number from [-1, 1] interval. Returns: `number` Example: ```less asin(-0.8414709848078965) asin(0) asin(2) ``` Output: ```less -1rad 0rad NaNrad ``` ### cos Calculates cosine function. Assumes radians on numbers without units. Parameters: `number` - a floating point number. Returns: `number` Example: ```less cos(1) // cosine of 1 radian cos(1deg) // cosine of 1 degree cos(1grad) // cosine of 1 gradian ``` Output: ```less 0.5403023058681398 // cosine of 1 radian 0.9998476951563913 // cosine of 1 degree 0.9998766324816606 // cosine of 1 gradian ``` ### acos Calculates arccosine (inverse of cosine) function. Returns number in radians e.g. a number between 0 and π. Parameters: `number` - a floating point number from [-1, 1] interval. Returns: `number` Example: ```less acos(0.5403023058681398) acos(1) acos(2) ``` Output: ```less 1rad 0rad NaNrad ``` ### tan Calculates tangent function. Assumes radians on numbers without units. Parameters: `number` - a floating point number. Returns: `number` Example: ```less tan(1) // tangent of 1 radian tan(1deg) // tangent of 1 degree tan(1grad) // tangent of 1 gradian ``` Output: ```less 1.5574077246549023 // tangent of 1 radian 0.017455064928217585 // tangent of 1 degree 0.015709255323664916 // tangent of 1 gradian ``` ### atan Calculates arctangent (inverse of tangent) function. Returns number in radians e.g. a number between `-π/2` and `π/2`. Parameters: `number` - a floating point number. Returns: `number` Example: ```less atan(-1.5574077246549023) atan(0) round(atan(22), 6) // arctangent of 22 rounded to 6 decimal places ``` Output: ```less -1rad 0rad 1.525373rad; ``` ### pi Returns π (pi); Parameters: `none` Returns: `number` Example: ```less pi() ``` Output: ```less 3.141592653589793 ``` ### pow Returns the value of the first argument raised to the power of the second argument. Returned value has the same dimension as the first parameter and the dimension of the second parameter is ignored. Parameters: - `number`: base -a floating point number. - `number`: exponent - a floating point number. Returns: number Example: ```less pow(0cm, 0px) pow(25, -2) pow(25, 0.5) pow(-25, 0.5) pow(-25%, -0.5) ``` Output: ```less 1cm 0.0016 5 NaN NaN% ``` ### mod Returns the value of the first argument modulus second argument. Returned value has the same dimension as the first parameter, the dimension of the second parameter is ignored. The function is able to handle also negative and floating point numbers. Parameters: - `number`: a floating point number. - `number`: a floating point number. Returns: number Example: ```less mod(0cm, 0px) mod(11cm, 6px); mod(-26%, -5); ``` Output: ```less NaNcm; 5cm -1%; ``` ### min Returns the lowest of one or more values. Parameters: `value1`, ..., `valueN` - one or more values to compare. Returns: the lowest value. Example: `min(5, 10);` Output: `5` Example: `min(3px, 42px, 1px, 16px);` Output: `1px` ### max Returns the highest of one or more values. Parameters: `value1`, ..., `valueN` - one or more values to compare. Returns: the highest value. Example: `max(5, 10);` Output: `10` Example: `max(3%, 42%, 1%, 16%);` Output: `42%`
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