R : Sum and Loop

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R : Sum and Loop



I am new to R , and my issue is like If i have a data frame with three columns and with value 10 , 20 and 30. I want to ran a loop 3 times.
The output should I get 30 60 and 90.



If I run the loop four times : then it should be 40 , 80 and 120.



Please help.









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