Converts a real number to a string.

*N* - the number you want to convert

*Str1* - the number N in string form

L₁, L₂, Y₁, Str1, N

TI-83/84/+/SE

**Note:** If you have a TI-84+ CE with OS 5.2 or higher, you can ignore this entire routine and just use the `toString(` command.

```
:{0,1→L₁
:NAns→L₂
:LinReg(ax+b) Y₁
:Equ►String(Y₁,Str1
:sub(Str1,1,length(Str1)-3→Str1
```

This code works because it creates two points with a known best fit line: the best fit line through (0,0) and (1,N) is y=Nx+0. `LinReg(ax+b)` calculates this best fit line, and stores its equation to `Y₁`.

Then, we use `Equ►String(` to store this equation to `Str1`, which now contains "NX+0" with N replaced by the numerical value of N. After that, the sub( command get rids of the "X+0" at the end, leaving only the string representation of N.

This routine uses `L₁`, `L₂`, and `Y₁`, so you should clean up those variables at the end of your program. If you're working with the graph screen in function mode, storing to `Y₁` can be a problem since it will draw an unwanted line through your graphics. Use `r₁` instead but make sure the calculator isn't in polar mode.

**Note:** This only works for real numbers. With complex numbers, such as imaginary numbers, you can use this code at the end of the first to get the same effect with *i* in it. This routine will also only work for N<10^50. To convert larger N, see the alternate below.

`:Str1+"i→Str1`

# Alternate Routine

The following routine will perform the same function for converting N to a string as shown above. This routine, however, allows N to be as large as the TI-84+ overflow limit (10^100) by utilizing `Med-Med` regression.

```
:{0,.5,1→L₁
:NAns→L₂
:Med-Med Y₁
:Equ►String(Y₁,Str1
:sub(Str1,1,length(Str1)-3→Str1
```

# Related Routines

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