How do I reverse a phone number?

How do I reverse a phone number?

How to reverse a number mathematically.

1. Step 1 — Isolate the last digit in number. lastDigit = number % 10. The modulo operator (%) returns the remainder of a divison.
2. Step 2 — Append lastDigit to reverse. reverse = (reverse * 10) + lastDigit.
3. Step 3-Remove last digit from number. number = number / 10.

What is it called when you invert a number?

Opposite numbers Every number has an opposite. In fact, every number has two opposites: the additive inverse and the reciprocal—or multiplicative inverse. Don’t be intimidated by these technical-sounding names, though. Finding a number’s opposites is actually pretty straightforward.

How do you reverse a negative number?

You can see by multiplying a number by 10 you increase the number of digits by 1 and then add the last digit. For negative numbers, we multiply it by -1 to first make it positive and then apply the same logic, while returning numbers we just multiply it by -1 again to convert the reversed number into negative.

How do you flip a number in Java?

How to Reverse a Number in Java

1. First, we find the remainder of the given number by using the modulo (%) operator.
2. Multiply the variable reverse by 10 and add the remainder into it.
3. Divide the number by 10.

How do you reverse a number in a function?

C Program to Reverse a Number using Function

1. #include
2. #include
3. Reverse(int n)
4. {
5. int sum=0;
6. while (n!=0)
7. {
8. sum = sum*10 + n%10;

What is a reciprocal of 13?

3
Likewise the reciprocal of 13 is 3 and so on.

What is a reciprocal of 5 8?

The reciprocal of 5/8 is 8/5.

How do you reverse a negative number in C?

C Program to reverse a negative number using recursion:

1. int reversDigits(int num)
2. if(num > 0)
3. reversDigits(num/10);
4. rev_num += (num%10)*base_pos;
5. int main()
6. printf(“Enter any number = “);
7. scanf(“%d”, &number);
8. tmp = (number < 0)?(- 1 * number): number;