I trying to learn Python but here i lost the connection:
x = 0
y = 0
while x < 5:
for t in "Hello":
y = y + 1
print("x " + str(x) + " y " + str(y))
x = x + 1
What is the connection between for t in "Hello": and str(y) how the programs get the lenght of the word hello ??
MIT 6.189 A Gentle Introduction to Programming Using Python (OCW)
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for t in 'Hello': means that it takes every letter of the string 'Hello'.
so what it does is : for every letter in the string it adds 1 to y.
i got it so everything what is under the for loop is been executed as well ( y = y + 1)
'for t in "Hello":' iterates over the string "Hello", putting each letter into the variable t. All this code does with that information though is increment the value in y (which starts at 0), such that after that for loop finishes executing, y is equal to the number of letters in "Hello". It is a little bit confusing because 'for t in "Hello":' seems to suggest that you want to do something with each letter in "Hello". Python has a built in len() function that can give you the length of a string, so if all you want is for y to equal the length of the string, y = len("Hello") works just fine. If you want do something as many times as there are letters in hello, its a bit more verbose but "for i in range(0,len("Hello")):' seems to better describe what you are trying to do.