Did you change the language of the paragraph/character style to a language which uses arabic numbers?
Yes, and it's still the same.
Do you use a font which supports these numbers? Do you use a OTF font? Did you try with a different font which contains such glyphs?
Does you Id Version support ME capabilities, either by plugin or because it is a ME version?
I changed the Digits to "Arabic (0123456789)" but no change happened to my paragraph. The digits are still displayed in "Hindi" format.
Are there any overrides on the paragraph? If there is a plus symbol next to the style name when you have selected some text in the paragraph, then the selected text doesn't match the Paragraph Style in some way. You'd need to clear the overrides (by right-clicking on the style name? I never remember, I assigned a keyboard shortcut because I spend so much time clearing overrides) to get the text to return to the style you defined.
It could also be a character style that has an overt "Hindi digits" definition. Are there any character styles applied?
I am designing a book in arabic. When I type numbers they are in Hindi (١،٢،٣...) format. I want the numbers to be typed in arabic (0,1,2,3...) because that's what is used in arabic.
I usually see Hindi numerals used in Arabic. Because I set type for an Arabic-reading population in the US, my translators often like to use both numeral systems within the same document. (You know, Arabic for phone numbers and street numbers, but Hindi for everything else.) But when I read documents that come from places where Arabic is the dominant or sole language, the numerals are almost always exclusively in Hindi format. So maybe I'm not understanding what you say here, but it sounds incorrect to me.
I think it's all about font support because it works in another font. I don't have any idea if there's a way to fix the numbers in a font and make them use a default setting or import it from a default font. If there's please inform me. If there isn't then it's okay. And thanks a lot for the help