String Array to JSON String
C 108
Thanks to Jonathan Frech this answer is now incredibly shorter
Thanks to @ceilingcat for some very nice pieces of golfing - now even shorter
i;main(c,v)char**v;{for(;++i&lt;c;printf(&quot;%c\&quot;%s\&quot;:%s&quot;,!~-i*79+44,v[i],++*v))*(*v=index(i[v],58))=0;puts(&quot;}&quot;);}

Try it online!