switch statements, doesn't execute and goes straight to default =[

Why does it execute default statement when one of the cases has been entered ?

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#include <iostream>
using namespace std;
#include<cmath>
int main()
{
	int number;
	double radious_circle, circle_area, length_rectangle, width_rectangle, rectangle_area, triangle_base, triangle_height, triangle_area;
	cout<<"Enter 1,2,3 or 4";
	cin>>number;
	switch(number)
	{
		case1: cout<<"Please enter the radious of a circle and I will calculate the area";
				cin>>radious_circle;
				if(radious_circle>=0)
				{	
					circle_area=(3.14159)*pow(radious_circle,2);
					cout<<"The area of the circle is" <<circle_area<<endl;
				}
				else
				{	
					cout<<"Please enter positive numbers only!";
				}
				break;
		case2: cout<<"Please enter the length and width of a rectangle and I will calculate the area";
				cin>>length_rectangle>>width_rectangle;
				if(length_rectangle>=0 && width_rectangle>=0)
				{
					rectangle_area = length_rectangle*width_rectangle;
					cout<<"The area of the rectangle is"<<rectangle_area<<endl;
				}
				else
				{
					cout<<"Please enter positive numbers only!";
				}
				break;
		case3: cout<<"Please enter the length of a triangle's base and it's height and I will calculate the area";
				cin>>triangle_base>>triangle_height;
				if(triangle_base>=0 && triangle_height>=0)
				{
					triangle_area=(triangle_base*triangle_height)/2;
					cout<<"The area of the triangle is"<<triangle_area;
				}
				else
				{
					cout<<"Please enter positive numbers only!";
				}
				break;
		case4: cout<<"This program has ended, Thank you!";
				break;
		default: cout<<"You did not enter 1, 2, 3, or 4";
	}
	return 0;
}
Because there should be a whitespace between the word 'case' and the number.
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case 1: 
    cout<<"Please enter the radious of a circle and I will calculate the area";
@computergeek01 thank you so so so so so so so so so so so much! ;D
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