I have many doubts about parseInt, I can not understand anything

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I have many doubts about parseInt, I can not understand anything

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I'm in a course to apply to a Programming school but for more I've searched, I can not understand the parseInt, could someone explain to me?

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asked by Dannie Sarer 13.09.2018 в 06:32

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score 2 · Answer 1

The MDN documentation has good information about the function parseInt .

Let's assume you have a text string with a number:

let numeroA = '10';

The variable numeroA contains a text string string , which contains the characters 11 . But this is not a number, it is a string of text which turns out to have numeric characters.

The parseInt() function can take this value and convert it to a number.

let numeroB = parseInt(numeroA);

Which will store a numeric data type in the variable numeroB .

The function parseInt() has many options like converting numbers in different bases (decimal, octal, hexadecimal), check if what is entered can not be interpreted as a number (for which the function would return a NAN ) .