1-6-12

Input

kUsing Single-character Variables

As its name suggests, a single-character variable is a variable name that consists of a single character like “a” or “x”. Input of single-character variable names is subject to different rules than input of a series of multiple characters (like “abc”).

uTo input a single-character variable name

Any character you input using any one of the following techniques is always treated as a single-character variable.

Tapping any key in the math (mth) keyboard’s V key set (page 1-6-10)Tapping any key in the 2D keyboard’s V key set (page 1-6-17)

Tapping the X, Y, Zor [key to the left of the 9 key of the math (mth) keyboard or 2D keyboard

Pressing the x, y, or Zkeypad key

If you use the above key operations to input a series of characters, each one is treated as a single-character variable. Inputting A, B, C, for example, is treated as the mathematical expression a b c, and not as the characters “abc”.

Tip

The single-character variables described above make it possible for you to perform calculations as they appear in your textbook.

Example 1: 9VABCwExample 2: 2xyE

Tip

When you input a single-character variable, its name appears on the display as an italicized bold character. This is simply to let you know that the letter is a single-character variable name.

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