In C/C++, when should you use the comma (,) operator instead of the semicolon (;) statement terminator?

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int a=2; b=a; b=a+2; Instead of the above two statements we can write it as b=(a,a+2); The value of b is 4
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comma operator is used in case of any expression where so many operations performes one after another. semi colon is a statement terminator as in english we use full stop to end a statement we use this to end a c++ programming statement.
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Better you practice in Dev c++
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Yes it will strengthen your fundamental in programming
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No no it can be learned in any other languaages like java , c++
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