proof of 0 ! = 1 factorial 0 is 1 factorial 0 factorial 0 ka man factorial 0 ka man 1 kyu hota h factorial 0 ki value prove that factorial 0 is 1 factorial 0 is 1 demonstration 0 factorial value 0 ka factorial kya hai #maths #shortsfeed #shortvideo #shorts #short #education #maths #educational #viralshort #viralvideo #viralreels #viral #trending #trendingshorts #trend #trendingvideo #trendingreels #trendingsong #ssc #ssccgl #sscgd #sscchsl #bankpo