Python Comparison Operator - Toán tử so sánh trong Python
Một số phép so sánh thông thường trong Python để so sánh 2 giá trị như:
-
<
Bé hơn -
<=
Bé hơn hoặc bằng -
>
Lớn hơn -
>=
Lớn hơn hoặc bằng -
==
Bằng -
!=
Khác
Hỗ trợ dạng so sánh kép như:
x = 2
1 < x < 3 # True
10 < x < 20 # False
3 > x <= 2 # True
2 == x < 4 # True
Ví dụ:
a = 21
b = 10
c = 0
if ( a == b ):
print "Line 1 - a is equal to b"
else:
print "Line 1 - a is not equal to b"
if ( a != b ):
print "Line 2 - a is not equal to b"
else:
print "Line 2 - a is equal to b"
if ( a <> b ):
print "Line 3 - a is not equal to b"
else:
print "Line 3 - a is equal to b"
if ( a < b ):
print "Line 4 - a is less than b"
else:
print "Line 4 - a is not less than b"
if ( a > b ):
print "Line 5 - a is greater than b"
else:
print "Line 5 - a is not greater than b"
a = 5;
b = 20;
if ( a <= b ):
print "Line 6 - a is either less than or equal to b"
else:
print "Line 6 - a is neither less than nor equal to b"
if ( b >= a ):
print "Line 7 - b is either greater than or equal to b"
else:
print "Line 7 - b is neither greater than nor equal to b"
Output:
Line 1 - a is not equal to b
Line 2 - a is not equal to b
Line 3 - a is not equal to b
Line 4 - a is not less than b
Line 5 - a is greater than b
Line 6 - a is either less than or equal to b
Line 7 - b is either greater than or equal to b
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