Remove digits from a number in Java

java integer digit
user3159331 picture user3159331 · Jan 4, 2014 · Viewed 41.9k times · Source

How do I remove the first digit of an integer?

My input is an integer (for example i = 123456789).

I then want to remove the first digit, so that i equals 23456789.

Answer

Evgeniy Dorofeev picture Evgeniy Dorofeev · Jan 4, 2014

try this

n = n % (int) Math.pow(10, (int) Math.log10(n));

Related questions

How do I generate random integers within a specific range in Java?

How do I generate a random int value in a specific range? I have tried the following, but those do not work: Attempt 1: randomNum = minimum + (int)(Math.random() * maximum); // Bug: `randomNum` can be bigger than `maximum`. Attempt 2: Random rn = new …

Read More
max value of integer

In C, the integer (for 32 bit machine) is 32 bits, and it ranges from -32,768 to +32,767. In Java, the integer(long) is also 32 bits, but ranges from -2,147,483,648 to +2,147,483,647. I do not understand how the range is different in Java, even …

Read More
How to get the separate digits of an int number?

I have numbers like 1100, 1002, 1022 etc. I would like to have the individual digits, for example for the first number 1100 I want to have 1, 1, 0, 0. How can I get it in Java?

Read More