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Does == mean not equal to?

im getting confused on the use of the double equals sign

11th Sep 2017, 4:18 PM
Andrea Savanna Livingston
Andrea Savanna Livingston - avatar
3 odpowiedzi
+ 3
So, x = 5 print(x) will put 5 on the screen. You "assigned" 5 to x, and any place where you need a 5, you can now use x instead. Putting the variables aside for a bit, to check for 2 things being equal, we would use "==". You use it mostly for if/else, yeah. It's a natural fit! For example, to check whether 10 is equal to 10: if(10 == 10): print("This happens") else: print("This doesn't happen") Since 10 is in fact 10 (duh), we'll se the program jump into the if part of the if/else. Here: if(11 == 10): print("This doesn't happen") else: print("This happens") we see the opposite. The condition fails, so we jump into the else block. Now back to variables! if(x == 5): print("This happens") because way up above we assigned 5 to x, and now we check whether that holds. The behind the scenes if you will are booleans, maybe you've heard of them. Check this: print(2 == 2) is a correct program and will print "true". print(2 == 3) will print "false". These are the two boolean values we use to check for truthy-ness or falsy-ness inside if statements. That is to say, if(true): print("This happens") y = true if(y): print("This happens") y = x == 5 if(y): print("This happens") will all work. I hope that explains things!
11th Sep 2017, 4:41 PM
Schindlabua
Schindlabua - avatar
+ 2
= is for assigning things to variables, like x = 5 x now stores the value 5. == is for equality checks, like if(x == 5) Its like that for most programming languages, by the way, not just python :)
11th Sep 2017, 4:21 PM
Schindlabua
Schindlabua - avatar
0
can you explain what eqaulity checks are? is it the if else statment only?
11th Sep 2017, 4:25 PM
Andrea Savanna Livingston
Andrea Savanna Livingston - avatar