On Tuesday, November 28, 2017 at 6:09:17 AM UTC+8, Ned Batchelder wrote: > On 11/27/17 7:54 AM, Cai Gengyang wrote: > > Input : > > > > count = 0 > > > > if count < 5: > > print "Hello, I am an if statement and count is", count > > > > while count < 10: > > print "Hello, I am a while and count is", count > > count += 1 > > > > Output : > > > > Hello, I am an if statement and count is 0 > > Hello, I am a while and count is 0 > > Hello, I am a while and count is 1 > > Hello, I am a while and count is 2 > > Hello, I am a while and count is 3 > > Hello, I am a while and count is 4 > > Hello, I am a while and count is 5 > > Hello, I am a while and count is 6 > > Hello, I am a while and count is 7 > > Hello, I am a while and count is 8 > > Hello, I am a while and count is 9 > > > > The above input gives the output below. Why isn't the output instead : > > > > Hello, I am an if statement and count is 0 > > Hello, I am a while and count is 0 > > Hello, I am an if statement and count is 1 > > Hello, I am a while and count is 1 > > Hello, I am an if statement and count is 2 > > Hello, I am a while and count is 2 > > Hello, I am an if statement and count is 3 > > Hello, I am a while and count is 3 > > Hello, I am an if statement and count is 4 > > Hello, I am a while and count is 4 > > Hello, I am a while and count is 5 > > Hello, I am a while and count is 6 > > Hello, I am a while and count is 7 > > Hello, I am a while and count is 8 > > Hello, I am a while and count is 9 > > It's easy to imagine that this sets up a rule that remains in effect for the > rest of the program: > > â â â if count < 5: > â â â â â â â print "Hello, I am an if statement and count is", count > > But that's not how Python (and most other programming languages) works.â > Python > reads statements one after another, and executes them as it encounters > them.â > When it finds the if-statement, it evaluates the condition, and if it is true > *at that moment*, it executes the contained statements.â Then it forgets all > about that if-statement, and moves on to the next statement. > > --Ned.
Sure, so how would the code look like if I want the "if" statement to be nested inside the "while" loop and give me the result : Hello, I am an if statement and count is 0 Hello, I am a while and count is 0 Hello, I am an if statement and count is 1 Hello, I am a while and count is 1 Hello, I am an if statement and count is 2 Hello, I am a while and count is 2 Hello, I am an if statement and count is 3 Hello, I am a while and count is 3 Hello, I am an if statement and count is 4 Hello, I am a while and count is 4 Hello, I am a while and count is 5 Hello, I am a while and count is 6 Hello, I am a while and count is 7 Hello, I am a while and count is 8 Hello, I am a while and count is 9 -- https://mail.python.org/mailman/listinfo/python-list
