Conver string to integer [duplicate] - javascript

This question already has answers here:
How to convert a string to an integer in JavaScript
(32 answers)
Closed 8 years ago.
I am getting a numeric value from an element using
$('.myEm').text();
It returns a number from the element, but I need to increment the value by another value.How do I convert it to an integer?

Use parseInt(... ) mate.
var a = parseInt("10")
http://www.w3schools.com/jsref/jsref_parseint.asp

Related

hi, how do i convert a number into a number explicitly [duplicate]

This question already has answers here:
How to convert a string to an integer in JavaScript
(32 answers)
Closed 1 year ago.
Convert the string "42" into a number explicitly.
I have to do this in javascript. What's the conversion
that s the problem
Use the parseInt(); function
var a = parseInt("42")
console.log(a);

How to convert a long String of numbers into number type in Javascript [duplicate]

This question already has answers here:
How to avoid scientific notation for large numbers in JavaScript?
(27 answers)
What is JavaScript's highest integer value that a number can go to without losing precision?
(21 answers)
Closed 4 years ago.
I am converting a long Sting of numbers values to number data type with Number() and parseInt() method of js but it is returning a hexadecimal value.
Does anybody know how to convert a long string values of number to Number data type?
// "1245458787546574878756756754561464567867"(type:String) to 1245458787546574878756756754561464567867 (type:Number)
var str = "1245458787546574878756756754561464567867";
console.log(Number(str)); //1.2454587875465749e+39
console.log(parseInt(str)); //1.2454587875465749e+39
console.log(parseInt(str,10)); //1.2454587875465749e+39
console.log(str.length); //40

String to Integer in Javascript [duplicate]

This question already has answers here:
javascript large integer round because precision? (why?)
(2 answers)
Javascript long integer
(3 answers)
Closed 4 years ago.
this is code
const str = '1111';
console.log(Number(str));
But When String's length over 17, it will be have problem
const str = '111100000123121221234'
console.log(Number(str)); // 111100000123121220000
I want to know, what's the principle of convert string to Integer of Number Object. Why convert wrong
Thank You Very Much
Because "Integers (numbers without a period or exponent notation) are accurate up to 15 digits". See: https://www.w3schools.com/js/js_numbers.asp

Why does it show value 5150 and not 155? [duplicate]

This question already has answers here:
How to add two strings as if they were numbers? [duplicate]
(20 answers)
Closed 4 years ago.
So im quite new to javascript and i tried making something simple as entering a value and add 150 to it but it wont show number + 150?
Pictures below
Code
Output
That's because you are concatenating strings. You need to convert the strings to integers by using parseInt(), and then add the numbers.
https://www.w3schools.com/jsref/jsref_parseint.asp
var fullprice = parseInt(price) + 150;
Because you're actually concatenating a string with a number. The input value is a string, so before operating with it, parse it to int with parseInt
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt

How to convert price format string into number in jquery [duplicate]

This question already has answers here:
How to convert a currency string to a double with Javascript?
(23 answers)
Closed 6 years ago.
I have a string like this
"$2,099,585.43"
"$" maybe any symbol, like #,#..etc.
I want to convert this into 2099585.43
Is there any simple way to do this?
Use String#replace and remove characters which are not a digit or dot.
console.log(
"$2,099,585.43".replace(/[^\d.]/g, '')
)

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