Javascript number type, javascript number

Javascript number type, javascript number
Javascript numeric type

There is only one Number type in js, which is called all numbers in Number. js. This type includes integers 1,-2, 3, floating point number 1.1,-1.2, and 1.3. Therefore, in js, both the typof integer and the typof floating point return number.

JS type conversion

Js has three common functions used to convert non-numeric to numeric, namely, Number (), parseInt, and parseFloat (). They can be called directly in the window scope. Usage:

ANumber = Number (notNumber );

AInt = parseInt (notNumber );

AFloat = parseFloat (notNumber );

From the function name, we can see the function's role:

Number (): You can convert a non-Number to a Number. The conversion result may be an integer or a floating point Number.

ParseInt (): converts a non-numeric type to a number. The conversion result is an integer, which is directly rounded up without rounding.

ParseFloat (): converts a non-numeric type to a numeric type. The conversion result is a floating point number.

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