Difference between revisions of "Conditionals"

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else:
 
else:
 
     print("one or both of the conditions are false")
 
     print("one or both of the conditions are false")
 +
 +
 +
# what do you think the output will be when you execute these instructions?
 +
 +
a = 5
 +
b = "bar"
 +
 +
if (a == 5 or b == "bar"):
 +
    print("both conditions are true.")
 +
else:
 +
    print("one or both of the conditions are false")
 +
 +
 
</syntaxhighlight>
 
</syntaxhighlight>
  

Revision as of 12:26, 27 January 2020

Programming basics[1]

Programs generally run from the "top down". A computer will read line one, execute line one, and then go to line two, for example. It is common to include conditional statements to decide if a program should "do something else" if a specific condition is true or false.

A conditional statement evaluates an expression and executes instructions depending on the outcome of the evaluation. Conditionals depend on operators to evaluate if an expression is true or false. A condition and selection are not the same thing. A condition asks a question. A selection processes the answer.

With gratitude to and permission from Stephen Hughes (Coe College) and Philip East (University of Northern Iowa)[2], The list below is an example of types of conditional questions. You should start thinking about conditions in plain english before you start thinking about operators.

  • Match
  • Threshold
  • Range
  • One-of
  • Not-match
  • Not one of
  • All of
  • Some of
  • Eligible

Conditional operators[edit]

Multiple conditionals code sample[edit]

# this file helps us to understand multiple conditions in Python.
# what do you think the output will be when you execute these instructions? 

a = 5
b = "bar"

if (a == 5 and b == "bar"):
    print("both conditions are true.")
else:
    print("one or both of the conditions are false")


# what do you think the output will be when you execute these instructions? 

a = 5
b = "bar"

if (a == 5 or b == "bar"):
    print("both conditions are true.")
else:
    print("one or both of the conditions are false")

Some videos[edit]



See Also[edit]

References[edit]

Assess the implications and limitations; make judgments about the ideas, works, solutions or methods in relation to selected criteria.

Give a sequence of brief answers with no explanation.