Float sum with javascript [duplicate]

Answer 1

Once you read what What Every Computer Scientist Should Know About Floating-Point Arithmetic you could use the .toFixed() function:

var result = parseFloat('2.3') + parseFloat('2.4');
alert(result.toFixed(2));​

Answer 2

(parseFloat('2.3') + parseFloat('2.4')).toFixed(1);

its going to give you solution i suppose