What does number + "e+4" mean in javascript [duplicate] - javascript

This question already has answers here:
'e' in javascript numbers
(3 answers)
Closed last month.
I have a code snippet with the following declaration:
const x = x + "e+4"
I dont understand what the "e+4" is and/or does.


This is a scientific notation.
e+4 is the same as writting * 10 ^ (+4)

Related

What does the + in this place means? [duplicate]

This question already has answers here:
What does this symbol mean in JavaScript?
(1 answer)
What's the significant use of unary plus and minus operators?
(2 answers)
Closed 2 years ago.
I have problem with understanding this code. I know what it do, but I dont understand the "+" after return.
function descendingOrder(n) {
return +n.toString().split('').sort().reverse().join('');
}

clarity on the meaning of this javascript math object syntax [duplicate]

This question already has answers here:
What do ">>" and "<<" mean in Javascript?
(10 answers)
What does the ^ (caret) symbol do in JavaScript?
(5 answers)
What do these JavaScript bitwise operators do?
(3 answers)
What does this symbol mean in JavaScript?
(1 answer)
Closed 8 months ago.
I was going through a small program and i came across this syntax in javascript.
hash = Math.abs((hash << 2) ^ (hash + y))
please what does it mean?
hash was initially 0; i.e hash = 0;

Get the last substring separated with / [duplicate]

This question already has answers here:
Getting just the filename from a path with JavaScript
(7 answers)
Closed 3 years ago.
Currently with my code:
window.location.pathname.split('/')[3]
I can get "comparative" from:
http://localhost/study/78/comparative
But it's possible that some subdirectories will be added to the URI.
How can I get the last substring (the most to the right) on the URI separated with / ?

Try with slice
window.location.pathname.split('/').slice(-1)[0]
console.log("http://localhost/study/78/comparative".split('/').slice(-1)[0])

window.location.pathname.split('/').slice(-1)[0]
or
window.location.pathname.split('/').pop()
or
window.location.pathname.substr(window.location.pathname.lastIndexOf("/") + 1)

getting a number using regular expressions [duplicate]

This question already has answers here:
Regular expression for extracting a number
(4 answers)
Closed 6 years ago.
I have the following string:
PR-1333|testtt
I want to get the number 1333 using regular expressions in javascript. How can I do that?

This will look for numbers in your text.
var text = "PR-1333|testtt";
var number = text.match(/\d+/g); // this returns an array of all that it found.
console.log(number[0]); // 1333

(Js) number method to add a comma after the first number and remove the 2 number after comma ?? is there any? [duplicate]

This question already has answers here:
How to round to at most 2 decimal places, if necessary
(91 answers)
Closed 8 years ago.
I want to format a number to two decimal places. Say the user enters 8764444 it should be formatted as 8.76. is there some built-in function in javascript to do that?

No, there is no built in method for exactly that, but you can use the substr method to get parts of a string to do the formatting:
var input = "8764444";
input = input.substr(0, 1) + '.' + input.substr(1, 2);
// show result in Stackoverflow snippet
document.write(input);

Categories