浮動小数点数リテラル

1.234
+1.234
-1.234

<script type="text/javascript">
var $sampleA = 1.234;
document . write( "変数「$sampleA」の値は、「" + $sampleA + "」<br />" );
document . write( "変数「$sampleA」のデータ型は、「" + typeof( $sampleA ) + "」<br />" );
var $sampleB = +1.234;
document . write( "変数「$sampleB」の値は、「" + $sampleB + "」<br />" );
document . write( "変数「$sampleB」のデータ型は、「" + typeof( $sampleB ) + "」<br />" );
var $sampleC = -1.234;
document . write( "変数「$sampleC」の値は、「" + $sampleC + "」<br />" );
document . write( "変数「$sampleC」のデータ型は、「" + typeof( $sampleC ) + "」<br />" );
</script>