Wolframalpha.com is one of the search engines that implement the semantic web in itwhere when we provide a keyword search will then produce a very precise answer. For instance we enter the key words “President of America”
Results of the search “President of America” is “Barack Obama”,otherwise it will display the information in the form of tenure,personal biodata
In addition, wolframalpha.com also can solve math problems, for example, you enter = 2×3, then wolframalpha.com will show the result of 6
So, wolframalpha.com is a very clever website, where every question will be answered. So that the website is very nice to use for learning.