But can you tell me how fool is written in Hindi?

'F' is Hindi alphabet. 'Phool' is Urdu word. There is slightly different pronunciation in Urdu. hence, this is marked by putting a point below 'f' in Devnagri script. The difference in pronunciation can be explained only by pronouncing and not by writing here.

sir, does it mean putting a dot under the alphabet makes it a different pronouncing alphabet?
Or, all words taken from Urdu are pronounced as pha instead of fa?

I think that putting a point below denotes different pronunciation. This is also done for 'J' and 'Z". For 'Z' also there is a point below Hindi 'J".

So, are you saying, putting a dot under the letter fa, it turns to pha?
Also, I would like to know if people strictly follow this rule while writing both these letters?

First of all, I would say that Sandhyaji you may be confused as because some one has written hindi with english alphabets. We write as we pronounce in hindi. Thus the spelling depends on our language.

So today we had a lesson on Hindi Varn mala even now I am also clear about pha and fa. :)

But I knew it some to the Urdu words we use in Hindi too in daily usage. :)

Here is the difference

Fa is picture no1
Pha is combination of 2+3

But what's the difference between these 2.....? Is their any difference in their usage?

Here is the difference

]
Fa is picture no1
Pha is combination of 2+3

But what's the difference between these 2.....? Is their any difference in their usage?