adding explaination and code sample for loops

adding explaination and code sample for loops, updated with feedback
FreeCodeCamp · 3f935e7d896a967774c60c7f3f8153333f3cc615 · Nandesh Guru committed Nov 20, 2015 · Nov 20, 2015 · 3f935e7
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commit 3f935e7d896a967774c60c7f3f8153333f3cc615
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+1 −1 For-loops-Explained.md
@@ -33,4 +33,4 @@ From the example above, you can read:
 
 
 ### Why we need "for loops"?
-For loops is used to loop through a block of code a known number of times. Sometimes it is the computer that knows how many times, not you, but it is still known. Also, check out other loops (While and Do While).
+For loops is used to loop through a block of code a known number of times. Sometimes it is the computer that knows how many times, not you, but it is still known. Also, check out other loops (While and Do While).