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conversation function java script

conversation function java script
  by useing this function we can convert variable data type into another data type
 parse int
 this  function is converts a variables values in to the integer data types  it convert each and every character of a string in integer until the possible  conversions and    returns the converted values
<script>
x=10;
y=20;
alert(parsInt((x)+y))
</script>
parse float :-
a
 it is same as pars int  to convert the input values as floating point  number  to check the Boolean values true  if it is  a  not a number  otherwise it return false , first it will convert the input string as number if it is converted successfully  then return false otherwise it return true
 <script>
a="1a00"
alert (is nan(a));
</script>   

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