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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 4: Programming Tools and Techniques"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 4.1: Quadratic_Equatio.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Example 4.1\n",
+"//Quadratic Equation\n",
+"//Page no. 96\n",
+"clc;clear;close;\n",
+"a=input('Enter value of a= ');\n",
+"b=input('Enter vlaue of b= ');\n",
+"c=input('Enter value of c= ');\n",
+"x1=(-1*b+sqrt((b^2)-4*a*c))/(2*a);    //1st root\n",
+"x2=(-1*b-sqrt((b^2)-4*a*c))/(2*a);    //2nd root\n",
+"printf('\n1st Root= %f', x1);\n",
+"printf('\n2nd Root= %f', x2);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 4.2: Database_Management.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Example 4.2\n",
+"//Database Management\n",
+"//Page no. 112\n",
+"clc;clear;close;\n",
+"M=[12,25,21,35;25,7,23,29;10,27,7,36;26,26,26,35;29,0,23,30];   //marks\n",
+"\n",
+"//calculation of composite score\n",
+"for i=1:5,\n",
+"    j=1;k=0;\n",
+"    max1=M(i,j);\n",
+"    if(max1<M(i,j+1))\n",
+"        max1=M(i,j+1)\n",
+"    else\n",
+"        k=1;\n",
+"    end,\n",
+"    \n",
+"        if(M(i,j+2)>M(i,j+k))\n",
+"        max2=M(i,j+2);\n",
+"    else\n",
+"        max2=M(i,j);\n",
+"    end,\n",
+"       CS(i,1)=max1+max2+M(i,4);\n",
+"end\n",
+"\n",
+"I=['Reg. No.','Name of Students','Test 1','Test 2','Test 3','Final';\n",
+"'CS/01','C.V.Rajan','12','25','21','35';\n",
+"'CS/02','B.X.Roy','25','07','23','29';\n",
+"'CS/03','P.C.Sasikumar','10','27','07','36';\n",
+"'CS/04','B.D.Box','26','26','26','35';\n",
+"'CS/05','K.K.Mukherjee','29','0','23','30';]\n",
+"printf('\n')\n",
+"for i=1:6\n",
+"    for j=1:6\n",
+"        if(j>2)\n",
+"                printf('\t')\n",
+"            end\n",
+"            \n",
+"        printf('%s  ',I(i,j));\n",
+"        if(i~=1)\n",
+"            if(j>2)\n",
+"                printf('\t')\n",
+"            end\n",
+"            printf('    ')\n",
+"            \n",
+"        end\n",
+"        if(i==1 & j==6)\n",
+"            printf('Composite Score\n')\n",
+"        end\n",
+"        \n",
+"    end\n",
+"    \n",
+"    if(i~=1)\n",
+"    printf('%i\n',CS(i-1,1));\n",
+"end\n",
+"\n",
+"end\n",
+"//disp(CS,'Composite Score',I);\n",
+"max1=CS(1,1);j=1;\n",
+"for i=2:5\n",
+"    if(max1<CS(i,1))\n",
+"        max1=CS(i,1);j=i;\n",
+"    end,\n",
+"end\n",
+"printf('\n\nTopper is:\n%s\t%s\t%s',I(1,1),I(1,2),'Composite Score')\n",
+"printf('\nCS/0%i\t\t%s\t\t\t%i',j,I(j+1,2),CS(j,1))"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}