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This will alert 23.
alert(parseInt('23 asdf'));
But this will not alert 23 but alerts NaN
alert(parseInt('asdf 23'));
How can I get number from like 'asd98'?
829
The number from a string in javascript can be extracted into an array of numbers by using the match method. This function takes a regular expression as an argument and extracts the number from the string. Regular expression for extracting a number is (/(\d+)/).
Extract Numbers from String in Excel (using VBA) Since we have done all the heavy lifting in the code itself, all you need to do is use the formula =GetNumeric(A2). This will instantly give you only the numeric part of the string. Note that since the workbook now has VBA code in it, you need to save it with .
To find numbers from a given string in Python we can easily apply the isdigit() method. In Python the isdigit() method returns True if all the digit characters contain in the input string and this function extracts the digits from the string. If no character is a digit in the given string then it will return False.
One of the most widely used data types is a string. A string consists of one or more characters, which can include letters, numbers, and other types of characters.
You can use a regex to get the first integer :
var num = parseInt(str.match(/\d+/),10)
If you want to parse any number (not just a positive integer, for example "asd -98.43") use
var num = str.match(/-?\d+\.?\d*/)
Now suppose you have more than one integer in your string :
var str = "a24b30c90";
Then you can get an array with
var numbers = str.match(/\d+/g).map(Number);
Result : [24, 30, 90]
For the fun and for Shadow Wizard, here's a solution without regular expression for strings containing only one integer (it could be extended for multiple integers) :
var num = [].reduce.call(str,function(r,v){ return v==+v?+v+r*10:r },0);
parseInt('asd98'.match(/\d+/))
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