Penggunaan Pengulangan ( Loops ) :
1. For Loop
Format :
for (value in vector) {
statements
}
Contoh 1 :
# Create fruit vector
fruit <- c('Apple', 'Orange',"Guava", 'Pinapple', 'Banana','Grapes')
# Create the for statement
for ( i in fruit){
print(i)
}
Contoh 2 :
# Creating an empty list
list <- c()
# Creating a for statement to populate the list
for (i in seq(1, 5, by=1)) {
list[[i]] <- i*i
}
print(list)
Contoh 3 :
# Creating a matrix
mat <- matrix(data = seq(10, 21, by=1), nrow = 6, ncol =2)
# Creating the loop with r and c to iterate over the matrix
for (r in 1:nrow(mat))
for (c in 1:ncol(mat))
print(paste("mat[", r, ",",c, "]=", mat[r,c]))
print(mat)
2. Repeat Loop
Format :
repeat {
commands
if(condition) {
break
}
}
Contoh 1 :
v <- c("Hello","repeat","loop")
cnt <- 2
repeat {
print(v)
cnt <- cnt+1
if(cnt > 5) {
break
}
}
Contoh 2 :
a <- 1
repeat {
if(a == 10)
break
if(a == 7){
aa=a+1
next
}
print(a)
a <- a+1
}
3. While Loop
Format :
while (test_expression) {
statement
}
Contoh 1 :
v <- c("Hello","while loop","example")
cnt <- 2
while (cnt < 7) {
print(v)
cntcnt = cnt + 1
}}
Contoh 2 :
n <- readline(prompt="Masukan nilai : ")
n <- as.integer(n)
num<-n
rev<-0
while(n!=0){
rem<-n%%10
rev<-rem+(rev*10)
n<-as.integer(n/10)
}
print(rev)
if(rev==num){
cat(num,"is a palindrome num")
}else{
cat(num,"is not a palindrome number")
}
