Cal11 calculator
Search calculator...

How to Put Less Than in Ti 84 Plus Calculator

Reviewed by Calculator Editorial Team

The TI-84 Plus calculator is a powerful tool for students and professionals, but entering special symbols like the less than symbol (<) can be confusing. This guide explains how to properly input the less than symbol in your TI-84 Plus calculator.

How to Enter the Less Than Symbol

The less than symbol (<) is commonly used in inequalities, programming, and data analysis. Here's how to enter it on your TI-84 Plus calculator:

Important Note

The TI-84 Plus uses a different method for entering special symbols than older models. Make sure you're using the correct method for your calculator model.

Method 1: Using the Alpha Key

  1. Press the ALPHA key (usually located near the 2nd function key).
  2. Press the , (comma) key. This will display the less than symbol (<).

Method 2: Using the Catalog

  1. Press the CATALOG key (usually 2nd PRGM).
  2. Scroll down to find the test( function (it's in the TESTS menu).
  3. Press ENTER to select it.
  4. Type your expression inside the parentheses, using the less than symbol (<) as needed.
Example: To enter "x < 5", you would type: test(x<5)

Keyboard Shortcuts

For faster input, you can use these keyboard shortcuts:

  • ALPHA + , - Inserts the less than symbol (<)
  • ALPHA + . - Inserts the greater than symbol (>)
  • ALPHA + - - Inserts the not equal symbol (≠)

Common Uses in Calculations

The less than symbol is used in various mathematical and programming contexts:

  • Inequality statements (e.g., x < 10)
  • Conditional statements in programs
  • Data filtering and analysis
  • Statistical comparisons
Example: To find all values in a list that are less than 5: list(<5)

Troubleshooting

If you're having trouble entering the less than symbol:

  • Make sure you're pressing the ALPHA key first, then the comma key.
  • Check that your calculator is in the correct mode (usually Math mode).
  • If using the Catalog method, ensure you're in the correct menu.
  • Try clearing your calculator's memory if symbols appear incorrectly.

FAQ

Can I use the less than symbol in programs?
Yes, you can use the less than symbol in programs and conditional statements. Just remember to use the ALPHA key combination to enter it.
Does the TI-84 Plus support other inequality symbols?
Yes, you can enter greater than (>), not equal (≠), and other comparison symbols using the ALPHA key with different keys.
Can I use the less than symbol in graphing?
Yes, you can use inequality symbols when defining functions or conditions for graphs.
What if the symbol doesn't appear correctly?
Try clearing your calculator's memory or restarting it. If the problem persists, your calculator might need servicing.
Is there a way to enter the less than or equal to symbol?
Yes, use ALPHA + - to enter the not equal symbol, then add the equal sign (=) to create ≤.