27 lines
537 B
R
27 lines
537 B
R
|
Check Prime Number
|
||
|
|
# Program to check if
|
||
|
|
# the input number is
|
||
|
|
# prime or not
|
||
|
|
|
||
|
|
# take input from the user
|
||
|
|
num = as.integer(readline(prompt="Enter a number: "))
|
||
|
|
|
||
|
|
flag = 0
|
||
|
|
# prime numbers are greater than 1
|
||
|
|
if(num > 1) {
|
||
|
|
# check for factors
|
||
|
|
flag = 1
|
||
|
|
for(i in 2:(num-1)) {
|
||
|
|
if ((num %% i) == 0) {
|
||
|
|
flag = 0
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(num == 2) flag = 1
|
||
|
|
if(flag == 1) {
|
||
|
|
print(paste(num,"is a prime number"))
|
||
|
|
} else {
|
||
|
|
print(paste(num,"is not a prime number"))
|
||
|
|
}
|