MahmoudElmasry7

class Calculator{

static double add(double a,double b){
  return a+b;
}
static double sub(double a,double b){
  return a-b;
}
static double mul(double a,double b){
  return a*b;

MahmoudElmasry7

int check(String text) //1
{
   if(text.length%2==0){
    print("even");
   }
   else{
   print("odd");
   }
   return text.length;
   }

MahmoudElmasry7

void main(){
String Mail= "mahmoud2006elmasry@gmail.com";
RegExp reg= RegExp(r"^[^\.\*\-\+\/\\][\w.]{10,30}[^\.\*\-\+\/\\]@(gmail|yahoo)\.com$");
print (reg.hasMatch(Mail));

print("--------");

String Url= "http://github.com";
RegExp reg2= RegExp(r"^(http|https)://[^\.\*\-\+\/\\\#][\w./]{4,}\.(com|org|net|io|gov|edu|dev|eg)$");
print(reg2.hasMatch(Url));

MahmoudElmasry7

void main(){
int size=3;
for(int i=0;i<size;i++){
  String dash="";
  String or="";
  
 for(int j=0;j<size;j++){
   dash+="  ---";
   or+=" |   ";
 }

MahmoudElmasry7

void main()
{

Map page={
"header":{
  "top":{
  "title":"company logo","nav":["Home","About","Products","Contact Us"]
  },
  "body":{
    "title":"company Name",

MahmoudElmasry7

//image url:https://cdn.venngage.com/template/thumbnail/full/98c75d47-f5a4-40a6-9913-d2be2659dc4c.webp
void main()
{
  var page=[
    {"product name":"office chair","description":"ergonomic office chair with lumber support","usd":120,"minimum quantity":10,"notes":"bulk discount available"},
    {"product name":"conference table","description":"6-foot conference table with metal legs","usd":450,"minimum quantity":5,"notes":"custom sizes available"},
    {"product name":"desktop computer","description":"intel i5,8gb ram,256 gb ssd","usd":750,"minimum quantity":15,"notes":"include one-year warrantly"},
    {"product name":"printer","description":"color laser printer,wirless","usd":200,"minimum quantity":20,"notes":"includes 2 toner cartidges"},
    {"product name":"whiteboard","description":"4*6feet(1.83m),magnetic surface","usd":180,"minimum quantity":8,"notes":"installation included"},
    {"product name":"filing cabinet","description":"4-drawer vertical filing cabinet","usd":150,"minimum quantity":10,"notes":