19th class at 15.05.2017

Today is uki 19th class 

Today I study javascript.
1)
<script>
var a=3;
if(a>10){
  document.write("value of "+a+" is greater than 10");
}
else {
  document.write("value of "+a+" not greater than 10");
}
</script>

2)
<script>
var age=15;
if(age>18){
  document.write("<b> Qualifies for driving </b>");
else{
  document.write("<b> Does not qualify for driving </b>");
}
</script>

3)
<script>
var mark=25;
if(mark>75){
  document.write("your marks is "+mark+" Garde A");
  }
  else if(mark>50){
    document.write("your marks is "+mark+" Garde B");
      }
      else if (mark>40) {
        document.write("your marks is "+mark+" Garde C");
          }
else  {
  document.write("your marks is "+mark+" Garde Fail");
}
</script>

4)
<script>
var salary=30000;
var mysalary=30000;
if(salary==mysalary){
  window.alert("your salary and my salary are same");
  }
  else if(salary>mysalary){
    window.alert("your salary is greater than my salary ");
      }
      else {
      window.alert("my salary is greater than your salary ");
          }
</script>

5)
<p id="demo"></p>
<script>
var day;
switch(new Date().getDay())
{
  case 0:
  day ="Sunday";
  break;
  case 1:
  day ="Monday";
  break;
  case 2:
  day ="Thuesday";
  break;
  case 3:
  day ="Wednesday";
  break;
  case 4:
  day ="Thursday";
  break;
  case 5:
  day ="Friday";
  break;
  case 6:
  day ="Saturday";
  break;
  default:
  day ="Unknown Day";
}
document.getElementById("demo").innerHTML="today is "+ day;
</script>

6)
<p id="demo"></p>
<script>
var month;
switch(new Date().getMonth() )
{
  case 0:
  case 2:
  case 4:
  case 6:
  case 7:
  case 9:
  case 11:
  month="this month has 31 days";
  break;
  case 1:
month="this month has 28 days";
  break;
  case 3:
  case 5:
  case 8:
  case 10:
  month="this month has 30 days";
  break;
    default:
  month ="Unknown Month";
}
document.getElementById("demo").innerHTML=month; 

thankyou