How to get the first digit of a number in java

How do you find the first digit of a number?

To finding first digit of a number is little expensive than last digit. To find first digit of a number we divide the given number by 10 until number is greater than 10. At the end we are left with the first digit.

How do you remove the first digit of a number in Java?

Here is one way to do it:

  1. Convert it to String.
  2. Take the substring without the first “digit”
  3. Convert it to int.

How do you switch the first and last digit of a number in Java?

Use below logic to swap first and the last digit.

  1. swappedNum = lastDigit;
  2. swappedNum *= (int) round(pow(10, digits));
  3. swappedNum += n % ((int)round(pow(10, digits)));
  4. swappedNum -= lastDigit;
  5. swappedNum += firstDigit;

How do you extract digits from a number?

Split number into digits in c programming, Extract digits from integer in c language

  1. int num,temp,factor=1;
  2. printf(“Enter a number: “);
  3. scanf(“%d”,&num);
  4. while(temp){
  5. printf(“Each digits of given number are: “);
  6. while(factor>1){
  7. printf(“%d “,num/factor);

9 мая 2016 г.

How do you find the second digit of a number?

3 Answers. You can do it by dividing by ten and then taking the remainder of division by ten: int second = (number / 10) % 10; In general, you could think of integer-dividing by a k -th power of ten as of dropping k least significant digits.

How do you find the second last digit of a number?

The first task is to do is get the last digit, also the second last digit along with it. For the above task, we will be taking the remainder of the above number and dividing it by 100. After taking the modulus of the number, we will be getting the last two digits of the number.

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How do you find the nth digit of a number?

If you wanted an iterative approach: Loop n times, each time assigning to the number variable the result of dividing the number by 10. After the loop, the nth digit is the remainder of dividing the number by 10.

What is the last digit of 7 355?

Answer and Explanation:

7 1 = 7. The last digit of 72=49 7 2 = 49 is 9.

What is the last number?

A googol is the large number 10100. In decimal notation, it is written as the digit 1 followed by one hundred zeroes: 10,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000,​000.

How do I get the digit of a number in Python?

4 Answers

  1. Use str to convert the number into a string so that you can iterate over it.
  2. Use a list comprehension to split the string into individual digits.
  3. Use int to convert the digits back into integers.

How do I get all the digits of a number in C++?

Consider using a while loop to get all digits of the number. Note the digits will be in reverse. You can use std::reverse() to reverse the digits such that the first element in the vector is the first digit of the number. Use std::accumulate() to obtain the sum of all digits.

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