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Finding the Absolute Value of a Number

Here's an official math definition for you:

The absolute value of a number is
its distance from zero on the number line.

* For the notation, we use two big vertical lines.

| a | = a | -a | = a

Check it out:

Find the absolute value of 4:

| 4 | = 4

Find the absolute value of -5:

| -5 | = 5