1. Using parseInt()
parseInt() parses a string and returns a whole number. Spaces are allowed. Only the first number is returned.
This m...
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The double tilde method is actually something I never thought about, but is worth explaining.
The double tilde "operator" is not as much as an operator as it's a double bitwise negation.
Let's cast
'64'
to64
using this method, so we do~~'64'
. First we will evaluate~'64'
. As bitwise operations work on binary,'64'
is cast to a number. So~64
.64
in binary is01000000
.~
will negate all the bits so it becomes10111111
, which is-65
since numbers in JavaScript are signed. Now we negate it again, which becomes01000000
, which is64
in decimal.Correction:
I previously stated that
10111111
is-63
, which is incorrect. It's actually-65
. Sorry about that.Thanks for explaining this. When I got to that one, I was wondering what it was. Great explanation.
Thank you. This was informative. I didn't pay attention about how it works while writing. Will note it down.
You should always pass the base as second argument to
parseInt
.This is a really helpful article! As a beginner in JavaScript, I often find myself struggling with converting strings to numbers. It's great to see all these different methods laid out with examples for each one. I especially appreciated the explanation of the parseFloat() function and the caution against using the unary plus operator on strings that could be mistaken for numbers. Thank you for sharing! FitGAG
In the first paragraph "If you parse the decimal number, it will be rounded off to the nearest integer value and that value is converted to string. " I think it should say "that value is converted to a number".
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The headline says: "If candy clicker parse the decimal number, it will be rounded off to the nearest integer value and that value is converted to string." I believe that the statement "That value is converted to a number" should be added.
Choosing the best method depends on your specific needs. If you need an integer, use parseInt. If you need a floating-point number, use parseFloat. Number() is a good general-purpose option, while the unary plus operator and multiplication by 1 are convenient for quick conversions but might have unexpected behavior. Remember to handle potential NaN results for robustness. Slope 3 is so addictive! I can't stop trying to beat my high score
how would we go about converting a 19 digit string to a number , js behaves very weirdly for that
e.g lets say this is the number 6145390195186705543 and want to convert it into number what it gives me is this 6145390195186705000. not sure why
thanks for the info.
Noice
thanks
Great explanation.
Thanks! 🥰💖
Using
x - 0
works, tooFor the string that includes comma (VD: '1,234.44'), you can use parseNumber function to avoid the further bug
Thanks very helpful 👍👌
nice info. some time forget about this and using lib js
I like the Using parseInt() method for generating numbers.
mbox converter
Thanks for the info dude,
Many thanks for this!