Which of the following are valid ways to update a variable?Choose as many answers as you see fit.total++total - 1total--total = total + 1
Question
Which of the following are valid ways to update a variable?Choose as many answers as you see fit.total++total - 1total--total = total + 1
Solution
To determine which of the given options are valid ways to update a variable, let's analyze each one step by step:
-
total++- This is a post-increment operation. It increases the value of
totalby 1. - Valid.
- This is a post-increment operation. It increases the value of
-
total - 1- This expression subtracts 1 from
totalbut does not update the variabletotalitself. - Not valid for updating the variable.
- This expression subtracts 1 from
-
total--- This is a post-decrement operation. It decreases the value of
totalby 1. - Valid.
- This is a post-decrement operation. It decreases the value of
-
total = total + 1- This explicitly updates
totalby adding 1 to its current value. - Valid.
- This explicitly updates
Therefore, the valid ways to update a variable from the given options are:
total++total--total = total + 1
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