What does ‘stack underflow’ refer to
Question
What does ‘stack underflow’ refer to
Solution
"Stack underflow" refers to an error that occurs in a computer program when that program tries to pop an item off an empty stack. A stack is a type of data structure where items are added (pushed) and removed (popped) in a last-in, first-out (LIFO) order.
Here are the steps that lead to a stack underflow:
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A stack is created in a program with a certain capacity. This stack is used to store data temporarily.
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During the execution of the program, data is added (pushed) to the stack and removed (popped) from it as needed.
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If the program tries to pop data from the stack when the stack is empty (i.e., all data has already been popped), there is nothing to pop, and a stack underflow occurs.
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This is considered an error because it means that the program is trying to access data that doesn't exist. This can lead to unpredictable behavior or the program crashing.
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To prevent stack underflows, programmers need to make sure they are not trying to pop from an empty stack. This can be done by checking if the stack is empty before trying to pop from it.
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