What methods do built-in objects have?

Built-in object methods include common methods of Array objects, common methods of String objects, common methods of Math objects, common methods of Date objects, etc. Detailed introduction: 1. Common methods of Array objects include push(), pop(), shift(), unshift(), concat(), slice(), splice(), etc.; 2. Common methods of String objects include length, charAt(), concat(), concat(), etc.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Different built-in objects have different methods. The following are some common examples of built-in objects and their methods:

1. Common methods of Array objects:

push() : Add one or more elements to the end of the array.

pop(): Remove and return the last element of the array.

shift(): Delete and return the first element of the array.

unshift(): Add one or more elements to the beginning of the array.

concat(): Concatenate two or more arrays.

slice(): Returns a part of the array.

splice(): Add or remove elements from an array.

2. Common methods of String objects:

length: Returns the length of the string.

charAt(): Returns the character at the specified index position.

concat(): Concatenate two or more strings.

indexOf(): Returns the first matching position of the specified character or substring.

substring(): Returns a part of the string.

toUpperCase(): Convert the string to uppercase.

toLowerCase(): Convert the string to lowercase.

3. Commonly used methods of Math objects:

abs(): Returns the absolute value of the number.

ceil(): Round up.

floor(): Round down.

round(): Rounding.

max(): Returns the maximum value in a set of numbers.

min(): Returns the minimum value in a set of numbers.

random(): Returns a random number between 0 and 1.

4. Common methods of Date objects:

getDate(): Returns a certain day in the month.

getMonth(): Returns the month (0-11).

getFullYear(): Returns the year.

getHours(): Returns the number of hours (0-23).

getMinutes(): Returns the number of minutes (0-59).

getSeconds(): Returns the number of seconds (0-59).

getTime(): Returns the number of milliseconds since January 1, 1970.

These are just some examples of methods of common built-in objects. Different built-in objects may have more methods. The specific method also needs to be determined according to the programming language and built-in objects used. You can consult relevant documentation or reference books to learn more about built-in object methods.

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