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Example: Find the factorial of a number
(Ref:https://www.datamentor.io/r-programming/examples/factorial/)
# take input from the user
num = as.integer(readline(prompt="Enter a number: "))
factorial = 1
# check is the number is negative, positive or zero
if(num < 0) {
print("Sorry, factorial does not exist for negative numbers")
} else if(num == 0) {
print("The factorial of 0 is 1")
} else {
for(i in 1:num) {
factorial = factorial * i
}
print(paste("The factorial of", num ,"is",factorial))
}
Output
Enter a number: 8 [1] "The factorial of 8 is 40320"
Example: Check to see if a number is positive negative or zero
(Ref:https://www.datamentor.io/r-programming/examples/factorial/)
# In this program, we input a number check if the number is positive or negative or zero
num = as.double(readline(prompt="Enter a number: "))
if(num > 0) {
print("Positive number")
} else {
if(num == 0) {
print("Zero")
} else {
print("Negative number")
}
}
Output 1
Enter a number: -9.6 [1] "Negative number"
Output 2
Enter a number: 2 [1] "Positive number"
Example: Check for Prime Number
(Ref:https://www.datamentor.io/r-programming/examples/factorial/)
# In this program, we input a number check if the number is positive or negative or zero
num = as.double(readline(prompt="Enter a number: "))
if(num > 0) {
print("Positive number")
} else {
if(num == 0) {
print("Zero")
} else {
print("Negative number")
}
}
Output 1
Enter a number: -9.6 [1] "Negative number"
Output 2
Enter a number: 2 [1] "Positive number"
Prime Number Check
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