Difference between revisions of "cpp/string/basic string/pop back"
From cppreference.com
< cpp | string | basic string
(P0980R1) |
m (Add simple example) |
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===Exceptions=== | ===Exceptions=== | ||
Throws nothing. | Throws nothing. | ||
| + | |||
| + | ===Example=== | ||
| + | {{example | ||
| + | | code= | ||
| + | #include <cassert> | ||
| + | #include <string> | ||
| + | #include <iostream> | ||
| + | |||
| + | int main() | ||
| + | { | ||
| + | std::string str("Short string"); | ||
| + | std::cout << "before='" << str << "'\n"; | ||
| + | assert(str.size() == 12); | ||
| + | |||
| + | str.pop_back(); | ||
| + | std::cout << " after='" << str << "'\n"; | ||
| + | assert(str.size() == 11); | ||
| + | } | ||
| + | | output= | ||
| + | before='Short string' | ||
| + | after='Short strin' | ||
| + | }} | ||
===See also=== | ===See also=== | ||
Revision as of 14:34, 18 January 2022
void pop_back(); |
(since C++11) (until C++20) |
|
| constexpr void pop_back(); |
(since C++20) | |
Removes the last character from the string.
Equivalent to erase(end()-1). The behavior is undefined if the string is empty.
Contents |
Parameters
(none)
Return value
(none)
Complexity
Constant.
Exceptions
Throws nothing.
Example
Run this code
#include <cassert> #include <string> #include <iostream> int main() { std::string str("Short string"); std::cout << "before='" << str << "'\n"; assert(str.size() == 12); str.pop_back(); std::cout << " after='" << str << "'\n"; assert(str.size() == 11); }
Output:
before='Short string' after='Short strin'
See also
| appends a character to the end (public member function) | |
| removes characters (public member function) |
