Some useful technique of using Number and String in JavaScript
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JavaScript is a lightweight, interpreted programming language.
Number: Number is a type in javaScript. The range of number value is= From (253 − 1) to 253–1.
The largest positive number in JavaScript = (253–1).
To see in editor=
The largest positive number in JavaScript = –(253–1).
To see in editor=
infinity and Infinity number
JavaScript has infinity and Infinity number:
Infinity number = 1/0 ,
-Infinity number = -1/0
Topics are:
Convert to another type
We can convert any other types of number value to an integer value. Example:
§ Convert binary to decimal number =
§ Convert string to number=
§ Convert octal to number:
Math.abs(x)
We can find the absolute value of a number using Math.abs
Math.ceil(x) , Math.floor(x)
To get the upper and lower integer value of a floating-point number, use ceil and floor
Math.max(x,y,…), Math.min(x,y,…)
Find the minimum and maximum number from numbers =
Find the minimum and maximum number from an Array =
We can find the minimum number in the same way.
Math.random()
We can find a random number in an array. To find a random number
Math.round()
We can find around value. The Math.round() function returns the value of a number rounded to the nearest integer.
Math.sqrt()
The Math.sqrt() function returns the square root of a number. Sqr value is the root value of a number. We can find it by using sqrt(). But it must be a number.
String:
A string is a data type used in programming language. It is a set of characters that can also contain spaces and numbers.
Topics are:
String values have to put in “ ” / ‘ ’/` `.
Example:
concat()
It is used to add to a string
includes(word)
includes is used to check if the word is there or not.
indexOf(“word”)
to find the position of the word or letter.
sentence.replace(‘the_word_to_be_replaced’,’replaced_word’))
To replace a word or sentence. Example:
String.substr(position1,position2)
String.trim()
Trim removes all space, tab, break space, etc.
