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Simple Programs to Begin With

use IDLE in linux/windows for the program development.Open a file and type the program .Save the file with extension '.py' eg: test.py. From the run menu click run module (F5) to run the program.If you are running the program from command prompt type $python test.py

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#Python Program to find Area and Circumference of a Circle
#Standard formula to calculate the Area of a circle is: a=π r².
#Circumference c=2 π r.

r=input(“Enter radius”)
a=3.14159 * r * r
c=2* 3.14159 * r
print “Area of the circle”,a
print “Circumference of the circle”,c

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#Input a time in seconds and print the time in HH:MM:SS format ( university question)
time=input("Enter time in seconds")
timeinmin=time/60
timeinsec=time%60
timeinhr=timeinmin/60
timeinmin=timeinmin%60
print "HH:MM::SS----",timeinhr,":",timeinmin,":",timeinsec

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Now you can try the following simple programs.
1) area of the circle given the diameter.
2)area of the circle given the circumference.(circumference=2*pi*r)
3)area of the circle given center point (x1,y1) and one point on the perimeter (x2,y2).
(Hint: input the two points and compute the distance between them as radius)
4)area of a triangle given three sides a,b,c.(use Heron's formula)
5)area and perimeter of a right angled triangle given width(w) and height(h).
(area=1/2.0*w*h .use Pythagoras theorem to find the hypotenuse then add the three sides to find the perimeter)
6)volume and surface area of a sphere given the radius.
(volume=4/3.0*pi*r*r*r surface area=4*pi*r*r)
7)area of an equilateral triangle given one side (s).( sqrt(3)/4.0*s*s)
8) volume and surface area of the cylinder given radius(r) and height(h).
(volume=pi*r*r*h surfacearea=2*pi*r*r+2*pi*r*h)
9) volume and surface area of a cube given one side ( s).
(volume=s*s*s surface area=6*s*s)
10)hypotenuse of a right-angled triangle, given the length of the other two sides.( university question) ( use Pythagoras theorem)
11)Enter length and breadth of a rectangle and find its area and perimeter.
12)Enter name and marks in 6 subjects of a student and find the total, average and percentage.
13)Enter temperature in Celsius and covert it into Fahrenheit.
( F=C*(9/5.0) + 32 )
14)Write a program to read P,T, R and calculate simple interest.(SI=(P*T*R)/100)
15)Write a program to read P,T,R and calculate compound interest.(CI=P(1+R/100)*T)
16)Input a time in seconds and print the time in HH:MM:SS format ( university question)
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