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I have a text file that I want to read. I want to know if one of the lines contains [ so I tried :
if(array[i] == "[") But this isn't working.
How can I check if a string contains a certain character?
375
Using in operator The Pythonic, fast way to check for the specific character in a string uses the in operator. It returns True if the character is found in the string and False otherwise. ch = '. '
The Java String contains() method is used to check whether the specific set of characters are part of the given string or not. It returns a boolean value true if the specified characters are substring of a given string and returns false otherwise. It can be directly used inside the if statement.
Look at the documentation string::find
std::string s = "hell[o"; if (s.find('[') != std::string::npos) ; // found else ; // not found Starting from C++23 you can use std::string::contains
#include <string> const auto test = std::string("test"); if (test.contains('s')) { // found! } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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