👉 In programming, a "single" is a variable or constant that holds one value at a time. It's not used with multiple values in a single statement. For example, if you have two variables `x` and `y`, they are both single. For example: ```python x = 42 print(x) # prints: 42 # Single variable single_variable = 'Hello' print(single_variable) # prints: Hello single_variable = 10