Question

How to parse a string argument and return a floating point number in JavaScript

Answer 1

document.write('parseFloat("3.14") = ' + parseFloat("3.14") + "<br />");  
document.write('parseFloat("0.0314E+2") = ' + parseFloat("0.0314E+2") + "<br />");  
document.write('parseFloat("314e-2") = ' + parseFloat("314e-2") + "<br />");  
document.write('parseFloat("3.14Round") = ' + parseFloat("3.14Round") + "<br />");  
document.write('parseFloat("F35") = ' + parseFloat("F35") + "<br />");  

 
/*
run

parseFloat("3.14") = 3.14
parseFloat("0.0314E+2") = 3.14
parseFloat("314e-2") = 3.14
parseFloat("3.14Round") = 3.14
parseFloat("F35") = NaN
 
*/

 

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