Does Tomcat require JDK or JRE?

Question

I\'ve read many articles and posts related to Tomcat and the Java runtime. I am confused and need help. Can anybody clear my doubt regarding whether Tomcat requires JDK or J

Answer 1

I did successfully installation of Apache Tomcat 7.0.56 when I installed C:\Program Files (x86)\Java\jre1.8.0_171 .

Additional note: After I did successfully installation of Apache Tomcat 7.0.56 when I installed C:\Program Files (x86)\Java\jre1.8.0_171 I have seen in Java Control Panel -> Desktop Settings:

Web Enabled : checked 
Platform : 1.8 
Product : 1.8.0_171 
Architecture : x86 Type : 
User Path : C:\Program files (86)\Java\jre1.8.0_171\bin\javaw.exe 
Runtime Parametars : (empty field)