IF YOU HELP ME I WILL GIVE YOU BRAINLIST AND 20 POINTS To represent the cost of an item in a store, a float variable should be used.

False

True

False

Explanation:

print 1

x = 2

print x

produces the output:

1

2

Again, the assignment statement produces no output.

2.5. Evaluating expressions

An expression is a combination of values, variables, and operators. If you type an expression on the command line, the interpreter evaluates it and displays the result:

>>> 1 + 1

2

The evaluation of an expression produces a value, which is why expressions can appear on the right hand side of assignment statements. A value all by itself is a simple expression, and so is a variable.

>>> 17

17

>>> x

2

Confusingly, evaluating an expression is not quite the same thing as printing a value.

>>> message = "What's up, Doc?"

>>> message

"What's up, Doc?"

>>> print message

What's up, Doc?

When the Python shell displays the value of an expression, it uses the same format you would use to enter a value. In the case of strings, that means that it includes the quotation marks. But the print statement prints the value of the expression, which in this case is the contents of the string.

In a script, an expression all by itself is a legal statement, but it doesn’t do anything. The script

17

3.2

"Hello, World!"

1 + 1

produces no output at all. How would you change the script to display the values of these four expressions?

2.6. Operators and operands

Operators are special symbols that represent computations like addition and multiplication. The values the operator uses are called operands.

The following are all legal Python expressions whose meaning is more or less clear:

20+32   hour-1   hour*60+minute   minute/60   5**2   (5+9)*(15-7)

The symbols +, -, and /, and the use of parenthesis for grouping, mean in Python what they mean in mathematics. The asterisk (*) is the symbol for multiplication, and ** is the symbol for exponentiation.

When a variable name appears in the place of an operand, it is replaced with its value before the operation is performed.

Addition, subtraction, multiplication, and exponentiation all do what you expect, but you might be surprised by division. The following operation has an unexpected result:

>>> minute = 59

>>> minute/60

0

sry need points : (

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