* ABS function: Many scientific calculators have an "ABS" function. You would typically enter the number first, then press the ABS button. The display will then show the absolute value.
* Second function: Some calculators have the ABS function as a second function (often indicated by a different color, usually yellow or blue) above another key. You would press the [2nd] or [Shift] key, followed by the key with the ABS function above it.
* Programming/Advanced Mode: More advanced calculators might require you to go into a programming or advanced mode to access the ABS function. Consult your calculator's manual for instructions.
* Manual Calculation (if no ABS function): If your calculator lacks an ABS function, you can manually calculate the absolute value:
* If the number is positive or zero, the absolute value is the number itself.
* If the number is negative, simply negate it (multiply by -1) to get the absolute value.
To find the modulus (absolute value), always consult your calculator's manual. The manual will show you the exact keystrokes or menu options necessary. The manual is usually available online as a PDF if you can find your calculator's model number.