python basics-operators

Operators

1. Arithmetic operations: +,-,*,/,%,**,//

print (3+2) => 5print (3-2) => 1print (2*4 ) => 8print (9/3) => 3print (2**2) => 4print (100%51) => 49print (9//2) => 4

2. Comparison operation : ==,!=,<>,>,<,>=,<=

print (3==2) => Falseprint (3!=2) => Trueprint (2< ;>4) => True #has been canceled in python3.5 and integrated into !=print (9>3) => Trueprint (2<2) => Falseprint (100>=51) => Trueprint (9<=2) => False

3. Assignment operations: =,+=,-=,*=,/=,%=,**=,//=

a = 5print (a) => 5a = 5b = 1b += a # b=b+aprint (b) => 6a = 5b = 1b -= a # b=b-aprint (b) => -4a = 5b = 1b * = a # b= b*aprint (b) => 5a = 5b = 1b /= a # b = b/aprint (b) => 0.2a = 5b = 1b **= a # b = b** aprint (b) => 1a = 5b = 1b %= a # b = b%aprint (b) => 1a = 5b = 1b //= a # b = b//aprint (b) => 0

4. Logical calculation: and, or ,not

a = Trueb = Falseprint (a and b) => False # It is true only when a and b are both true print (a or b) => ; True # As long as either a or b is true, it is true print (not a) => False # Not true print (not b) => True # Not false

5. Member operation: in , not in

a = [11,22,33,44]
b = 11
c = 123

print (b in a) =>True
print (c not in a) => True