Math, String,Number Object Methods
Math Object Methods
| Operator |
Description |
| abs(x) |
Returns the absolute value of x |
| acos(x) |
Returns the arccosine of x, in radians |
| asin(x) |
Returns the arcsine of x, in radians> |
| 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 |
| ceil(x) |
Returns x, rounded upwards to the nearest integer |
| cos(x) |
Returns the cosine of x (x is in radians) |
| 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) |
| sqrt(x) |
Returns the square root of x |
| tan(x) |
Returns the tangent of an angle |
Number Object Methods
| Operator |
Description |
| toExponential(x) |
Converts a number into an exponential notation |
| toFixed(x) |
Formats a number with x numbers of digits after the decimal point |
| toPrecision(x) |
Formats a number to x length |
| toString() |
Converts a Number object to a string |
| valueOf() |
Returns the primitive value of a Number object |
String Object Methods
| Method |
Description |
| charAt() |
Returns the character at the specified index |
| charCodeAt() |
Returns the Unicode of the character at the specified index |
| concat() |
Joins two or more strings, and returns a copy of the joined strings |
| fromCharCode() |
Converts Unicode values to characters |
| indexOf() |
Returns the position of the first found occurrence of a specified value in a string |
| astIndexOf() |
Returns the position of the last found occurrence of a specified value in a string |
| match() |
Searches for a match between a regular expression and a string, and returns the matches |
| valueOf() |
Returns the primitive value of a String object> |
| slice() |
Extracts a part of a string and returns a new string |
| replace() |
Searches for a match between a substring (or regular
expression) and a string, and replaces the matched substring with a new
substring |
| search() |
Searches for a match between a regular expression and a
string, and returns the position of the match |
| split() |
Splits a string into an array of substrings |
| substr() |
Extracts the characters from a string, beginning at a
specified start position, and through the specified number of character |
| substring() |
Extracts the characters from a string, between two specified
indices |
| toLowerCase() |
Converts a string to lowercase letters |
| toUpperCase() |
Converts a string to uppercase letters |
