Why does "10" > "9" = false? [duplicate] - javascript

This question already has answers here:
Why is one string greater than the other when comparing strings in JavaScript?
(5 answers)
Javascript string/integer comparisons
(9 answers)
Closed 8 years ago.
Is this a failure in JavaScript's attempt to convert them to numbers? If so, what numbers are they being converted to? Or what is the logic behind the string 10 being less than the string 9?

It's comparing the strings "alphabetically", and 1 comes before 9 in the character "alphabet".

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);

When to use + or Number() with string numbers? [duplicate]

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How to convert a string to an integer in JavaScript
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parseInt vs unary plus, when to use which?
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I see there + operator is being used to convert a string number to number and same does the Number() function ,
So i am wondering there must be good reason for + operator before string number being used in most cases over Number()
Is there any performance enhancement with + operator?
appreciate your help guys
note : don't get confuse with concatenation of string , its unary + oprator

What is the equivalent of java's String.format in javascript? [duplicate]

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Pad a number with leading zeros in JavaScript [duplicate]
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How can I pad a value with leading zeros?
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Closed 3 years ago.
I'm not looking for simple template literals, more so the functionalities of String.format from java.
For example,
String.format("%05d",num);
if inputted 14, would output 00014. How could I do this in javascript?

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

Is it possible to have a number / float in JavaScript with two decimal values as zeros? [duplicate]

This question already has answers here:
Trailing zeros in javascript
(2 answers)
JavaScript: Decimal Values
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Can JSON.stringify output a whole number formatted as a double?
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Closed 6 years ago.
I would like to return the number, 15.00, in a json payload: {"theNumber" : 15.00}. All my research on SO has suggested to do something like parseFloat(15).toFixed(2), but this always returns a string and therefore does not solve the problem of returning 15.00 as a number / float.
Is it possible to return a number in JS with two decimal values as zeros?

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