![]() If the first character cannot be converted to a number with the radix in use, parseInt returns NaN. is not a numeral either, the return value will always be an integer. The Number.parseInt () static method parses a string argument and returns an integer of the specified radix or base. For example, although 1e3 technically encodes an integer (and will be correctly parsed to the integer 1000 by parseFloat()), parseInt("1e3", 10) returns 1, because e is not a valid numeral in base 10. If parseInt encounters a character that is not a numeral in the specified radix, it ignores it and all succeeding characters and returns the integer value parsed up to that point. If no signs are found, the algorithm moves to the following step otherwise, it removes the sign and runs the number-parsing on the rest of the string. It is done as an initial step in the parsing after whitespace is removed. ![]() ParseInt understands exactly two signs: for positive, and - for negative. Description A BigInt value, also sometimes just called a BigInt, is a bigint primitive, created by appending n to the end of an integer literal, or by calling the BigInt () function (without the new operator) and giving it an integer value or string value. For example, for hexadecimal numbers (base 16), A through F are used. If the radix value (coerced if necessary) is not in range (inclusive) parseInt returns NaN.įor radices above 10, letters of the English alphabet indicate numerals greater than 9. If the radix is 16, parseInt() allows the string to be optionally prefixed by 0x or 0X after the optional sign character ( / -). The only prefix that parseInt() recognizes is 0x or 0X for hexadecimal values - everything else is parsed as a decimal value if radix is missing. parseInt() does not treat strings beginning with a 0 character as octal values either. Note: Other prefixes like 0b, which are valid in number literals, are treated as normal digits by parseInt(). Warning: unreachable code after return statement.Warning: -file- is being assigned a //# sourceMappingURL, but already has one.TypeError: X.prototype.y called on incompatible type.TypeError: setting getter-only property "x".TypeError: Reduce of empty array with no initial value.TypeError: property "x" is non-configurable and can't be deleted.TypeError: invalid assignment to const "x".TypeError: invalid 'instanceof' operand 'x'.TypeError: cannot use 'in' operator to search for 'x' in 'y'.TypeError: can't redefine non-configurable property "x".TypeError: can't delete non-configurable array element.TypeError: can't define property "x": "obj" is not extensible.Or NaN when the first non-whitespace character cannot be converted to a number. ![]() Return value A floating point number parsed from the given string. Leading whitespace in this argument is ignored.
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