484647789 by Unknown

Author:Unknown
Language: eng
Format: epub

In the following example, the loop continues if the number is 0 but stops (break) if it is 5, so we get 1 2 3 4.

n = list(range(10))

for x in n:

if x == 5: break

elif x == 0 : continue

else: print(x)

The “While” keyword also creates a loop, which break only if the condition is false. This may create a perpetual loop if the condition is always true.

n = 10

while n:

print(n)

n = n-1

In the above example, the while keyword evaluates the number to check if it is True, i.e. not 0 or None, print the number and reduce it by 1.Notice that any object in Python is True, except False, None or Zero.

The "and", "or" , "not" Keywords

Those logical operators are used with the “if” and other conditional statements to compare expressions against given conditions.

And : executes an expression if both the operands are true

Or : executes an expression if either of the operands is true

Not : executes an expression if an operand is false

Here is an example of using the three keywords:

Username = "Suresh"

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