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Floating number in linux cell script

---How can I represent floating number in linux cell scripting---
I am working in bash cell
code:

echo "Enter basic salary:"
read basic
echo "HRA `expr 0.2 \* $basic`"

Output shows:
non-numeric arguments.

<< HELP >>

Do you mean "shell"? There's no such thing as Linux cell scripting or the bash cell.

The shell can't operate on non-intergers, you'll need to pass it to something that can, such as bc:

Code:

echo "0.2 * $basic" | bc -l

You can also use GNU Octave. Have a look at this tutorial.

As an example, here is a script to convert a Xorg modeline into a framebuffer mode:

Code:

#!/usr/bin/octave -q

bpp = 16;

DCF = sscanf(argv(){1}, "%f");

HR  = sscanf(argv(){2}, "%f");

SH1 = sscanf(argv(){3}, "%f");

SH2 = sscanf(argv(){4}, "%f");

HFL = sscanf(argv(){5}, "%f");

VR  = sscanf(argv(){6}, "%f");

SV1 = sscanf(argv(){7}, "%f");

SV2 = sscanf(argv(){8}, "%f"); 

VFL = sscanf(argv(){9}, "%f");

pixclock = 1000000 / DCF;

left_margin = HFL - SH2;

right_margin = SH1 - HR;

hsync_len = SH2 - SH1;



# 3) vertical timings:

upper_margin = VFL - SV2;

lower_margin = SV1 - VR;

vsync_len = SV2 - SV1;



RR = DCF / (HFL * VFL) *1e6;

HSF = DCF / HFL * 1e3;



printf("mode \"%dx%d\"\n",HR,VR);

printf("  # D: %3.2f MHz, H: %3.2f kHz, V: %2.2f Hz\n", DCF, HSF, RR);

printf("  geometry %d %d %d %d %d\n", HR, VR, HR, VR, bpp);

printf("  timings %d %d %d %d %d %d %d\n", ...

                                pixclock, left_margin, right_margin, ...

                                upper_margin, lower_margin, ...

                                hsync_len, vsync_len);

printf("endmode\n");