Question

1. which of the following are not valid cout statements? (circle all that apply.) a) cout << \hello world\; b) cout << \have a nice day\

; c) cout < value; d) cout << programming is great fun;

Explanation:

• Option A: cout << "Hello World"; is a valid cout statement in C++ as it uses the insertion operator << to output a string literal.
• Option B: To output a newline in C++, we should use `

within double quotes or use endl. Here, "
" should be used instead of
outside quotes. So cout << "Have a nice day"
; is invalid because the newline character
` is not properly placed within the string literal.

• Option C: The correct operator for output with cout is <<, not <. So cout < value; is invalid as it uses the wrong operator.
• Option D: When outputting a string of text (not a string literal), we need to enclose it in double quotes. Programming is great fun is not a string literal (no quotes), so cout << Programming is great fun; is invalid as it tries to output identifiers (assuming Programming, is, great, fun are not defined variables, but even if they were, this is not the correct way to output a sentence).

Answer:

B. `cout << "Have a nice day"
;, C. cout < value;, D. cout << Programming is great fun;`