プログラミング学習の記録 121 実数の誤差、数値と真偽、関数の呼び出し。

<script language="JavaScript"> d=3.14+0.00159 document.write("3.14+0.00159=",d,"<br />誤差が発生"); </script> <br/><br/> <script language="JavaScript"> if(1) document.write("1はtrue<br />"); if(!1) document.write("1はfalse<br />"); if(-1) document.write("-1はtrue<br />"); if(!(-1)) document.write("-1はfalse<br />"); if(0) document.write("0はtrue<br />"); if(!0) document.write("0はfalse<br />"); </script> <br /> <script language="JavaScript"> function print_name(){ document.write("Kamimura"); } </script> <script language="JavaScript"> print_name(); </script> <br /><br /> <script language="JavaScript"> function add(n,m){ return n+m } </script> <script language="JavaScript"> var l=add(1,2); document.write("1+2=",l); </script>