Pattern based program in Javascript under node JS

 Pattern based program in Javascript under node JS,

Create this pattern

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

...........................................................................................

for(let i=1;i<=5;i++)  

{

   for(let j=1;j<=i;j++)

   {

        process.stdout.write(j+" ");

       

   }

   process.stdout.write("\n");

}

................................................................

Create this pattern

1 2 3 4 5 1 2 3 4 1 2 3 1 2 1

for(let i=1;i<=5;i++)  

{

   for(let j=1;j<=6-i;j++)

   {

        process.stdout.write(j+" ");

       

   }

   process.stdout.write("\n");

}

Another way to create pattern:

for(let i=5;i>=1;i--)   //i=0

{

   for(let j=1;j<=i;j++)  // j 1 to 1

   {

        process.stdout.write(j+" ");

       

   }

   process.stdout.write("\n");

}

Create this pattern:-

A B C D E A B C D A B C A B A

for(let i=5;i>=1;i--)   //i=0

{

    let ch=65

   for(let j=1;j<=i;j++)  // j 1 to 1

   {

        process.stdout.write(String.fromCharCode(ch)+" ");

        ch=ch+1;

       

   }

   process.stdout.write("\n");

}

Solve these problems:

1 2 3 4 5 1 2 3 4 1 2 3 1 2 1 .............................. 1 0 1 0 1 1 0 1 0 1 0 1 1 0 1 ............................. A a B b C A a B b A a B A a A .............................................. * * * * * * * * * * * * * ..............................

Without process.stdout

var s = '';

for(let i=5;i>=1;i--)   //i=0

{

    let ch=65

   

   for(let j=1;j<=i;j++)  // j 1 to 1

   {

        s+=String.fromCharCode(ch)+" ";

        ch=ch+1;

       

   }

   s+="\n"

   

}

console.log(s)