Question

R programming language.

Write a R code that adds integer 1, 2, 3, …. Until the sum is over 1000. Remember, the upper bound is not known. The stop is handled by the sum when it is over 1000. Students use a) while and b) repeat to do the work

Answer 1

Please Refer below snapshot of code i have commented code as well please refer in case of any doubt please let me know in comment section , i would be happy to help you.

Here is code:-

A)Using while

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#R version 3.3.2
# intializing num and sum
num <- 1
sum <- 0
# test to check if sum is less than 1000 and as soon as it is greater than 1000 loop should be false
while(sum < 1000){
  

num=num+1
sum = sum + num

  

}
print(sum)
print(num)

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B) using repeat

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#R version 3.3.2
  
num <- 1
sum <- 0

repeat{

num=num+1
sum = sum +num
if(sum>=1000){
  
break
}
}

print(sum)
print(num)

--------------------

1 #R version 3.3.2 2 # intial!zing num and sum 5 # test to check if sum is less than 1000 and as soon as it is greater than 1000 loop should be false 6 while(sum 1000) num= num+ 1 um sum 18 num 12 13 14 15 print(sum) 16 print (num) it (F8) | | Save it」 [+ ] Show input Live cooperation Put on a al Absolute running time: 0.29 sec, cpu time: 0.46 sec, memory peak: 30 Mb, absolute service time: 0,3 sec [1] 1034 [1] 45 Activate Windo Go to PC settings toa

1 #R version 3.3.2 3 num<1 Ling 6 repeat 7 Ne num-num+1 sum sum +num 11 if (sum-1000) 12 13 14 15 16 17 print (sum) 18 print (num) brea Run it (F8 Save it I-1 Show input Live cooperaton Put on a wallF Absolute running time: 0.38 sec, cpu time: 0.52 sec, memory peak: 30 Mb, absolute service time: 0,38 sec [1] 1034 [1] 45 Activate Window Go to PC settings to a

Explanation:-

when sum became greater than 1000 then while loop and repeat loop became false so in that time sum is 1034 and that time num value would be 45,

in mathematics we know that sum of n number formula that is:-

n(n+1)/2 if we will put n =45 than 45(46)/2=1035 let us take one number below ie. n =44 so 44(45)/2=990 so at num 45 it will became false first time .in case of doubt and query please do comment Thanks,