JS toString () method number () method and other type conversions

1.1 numeric type to string

String ()

variable . toString ()

ToString () method

The ToString () method converts a logical value to a string and returns the result.

1.2 string to numeric type

Number ()

★ Numeric Type of string, after conversion to get the number.

★ Non-numeric string, after conversion to get is NaN.

★ Decimal type of string, after conversion to get the original number.

parseint

★ Integer numeric type of string, converted to get an integer number.

★ The string at the beginning of the number, which is the number in front of the conversion.

★ A string that starts with a non-digit, and the conversion is NaN.

★ Decimal type of string, converted after rounding.

parsefloat

★ Integer numeric type of string, converted to get an integer number.

★ The string at the beginning of the number, which is the number in front of the conversion.

★ A string that starts with a non-digit, and the conversion is NaN.

★ Decimal type of string, after conversion to get the original number.

1.3 Turn Boolean type

Boolean ()

★ The number and string are trueafter the turn is complete.

★undefined,null,0 turns to false after completion .

1.4 implicit data-type conversions

JS toString () method number () method and other type conversions