Python - Conditionals, Defs, and Variables

print("Hello Python")

# declare a single variable
a = 2
name = "george"
print(name)

#declare multiple variables at the same time
b = c = 2

# standard math operations work
a = a + b +c
print(a)

#plus sign is used to put variables and strings together.
#str converts a string to a number.  Numbers cannot be added to strings.
print(name + " you are " + str(a))

# int truncates decimals
num = 9.345
print( int(num))
#
x = "9"
y = int(x)
y=y+2
print(y)
#
x= 2
y = 3
# you can print the result of a math operation
result = x > y
print(result)
# conditionals require a colon.
#indentation is extremely important.  Make sure to use the tab key!!!!!!
if x<y:
	print("x is less than y")
	print("wow you did it")

#else uses a colon also.
#input allows you to input data into a popup box or into the output section of your IDE
#in many IDEs the text i the input will appear and then you type a result.  In pythonfiddle your text
#and result appear after you enter your data.
score = 0
resp = input("who are you.  Please type here: ")
if resp == "bob" or resp == "jane":
	print("welcome bob and or jane")
	score = score + 1
else:
	print("who are you")

#input is always considered to be a string
#use int() to convert the input to a number
b = input("give me a number")
#  This would produce an error
#print(b + 5)

#this code works
print (int(b) + 5)
    
    
#defs are just functions that are used in python.  They can return data but they don't have to.  
#parameters are also optional if you need to use them
#the function call needs to occur after you have defined the function

def checkScore(myScore):
    if x >=90:
        print("good")
    else:
        print("bad")

checkScore(85)

#these defs return values to the function call
def subtract(z,y):
    return z-y

def multiply(z,y):
    return z*y

num1 = 5
num2 = 2
if subtract(num1,num2) >0:
    print ("the result is positive")
else:
    print("the result is negative")

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