[SOLVED] Write the code to check whether the given input(0-9) is a numeric value or not.

Question

we are not allowed to use two things.
1) int a;
if((a>=0)&&(a<=9))
System.out.print("valid number");
2) We are also not allowed to use the ASCII value .

Avoiding these two things, we have to write the code.

Answer 1

isn't this just basic regex usage?

Answer 2

Gaurav Raj https://www.sololearn.com/learn/9699/?ref=app

Answer 3

Gaurav Raj https://www.tutorialspoint.com/java/java_regular_expressions.htm

Answer 4

hinanawi can u plz elaborate

Answer 5

hinanawi
Thank you .
But how will i implent it in java code.

Answer 6

hinanawi
Thank you