Loops/Increment loop index within loop body: Difference between revisions
Loops/Increment loop index within loop body (view source)
Revision as of 12:50, 10 January 2022
, 2 years ago→{{header|R}}: Improved syntax.
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=={{header|R}}==
R cannot complete this task with a for loop. See https://stackoverflow.com/a/5913329/ . Instead, we must go down the same path as the Kotlin solution. Because it is sufficient for numbers this small, we will save ourselves some work and use the gmp library's isprime function for checking if a number is prime.
<lang rsplus>i <- 42
primeCount <- 0
while(primeCount < 42)
{
if(gmp::isprime(i) == 2)#1 means "probably prime" and won't come up for numbers this small, 2 is what we want.
{
primeCount <- primeCount + 1
extraCredit <- format(i, big.mark=",", scientific = FALSE)
cat("Prime count:", paste0(primeCount, ";"), "The prime just found was:", extraCredit, "\n")
i <- i + i#This is missing the -1 from the Kotlin solution. There is no need to check i + i (it's even).
}
i <- i + 1
}</lang>
{{Out}}
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