Why can't we use else statement with while in java, whereas if need be what is the best possible alternative?

Question

I've been studying python, java and some other languages. I've come across some commonalities and some differences which I understand to the best of my potentials. But I've come to know that we can't use else statement following a while loop in java, like I used to code in python. For instance I want to make a code that takes a input (let's say random integers) from a user, the user may wants to input as many as he can(I'd use while loop for such repeated action), or else he'd just enter 1 numbers. So, in this program I could use a while loop followed by a else statement if I were to code in python. But my main question is, if I were to code this approach in java, why can't I do it, and what is the best alternative?

Answer 1

Hello Ehtisham Rehmat

else belongs in all languages to if.

if (your condition) do this
else do that.

If you want a while loop you can use an if/else statement inside the loop.

Or you can use a break statement inside the loop which stops the loop.

Answer 2

Denise Roßberg and 𝐊𝐢𝐢𝐛𝐨 𝐆𝐡𝐚𝐲𝐚𝐥 I am glad to see your responses. I understand else follows if condition in all languages. Actually my question was as if I wanted to write a code as follow: (it's in python)

n = input("write multiple for multiple integer inputs: ")

my_list =[]
While n == "multiple":
num =int(input())
my_list.append(num)
# And whatever is the following code in the while body

else:
num = int(input("seems you've to enter an integer"))

print(f"You've entered {num} in your input")

So, if I were to design this approach in Java what is best alternative?

Answer 3

for your example

if ( multiple ) {
while(! end) {
// get input1
}
} else {
// get input2
}

but python works different
while(! end) {
// get input1
}
if (end) {
// something after normal end of while
}

it has sense if while ends with break, but end is stil not true

Answer 4

zemiak thanks brother, I really appreciate your help