Conditional logic is formed using which pair of words?

The correct pair of words for forming conditional logic is "if" and "then." This structure is fundamental in programming and logic to create statements that perform actions based on certain conditions being met.

When using "if," you establish a condition that must be true for the following action or outcome to occur. The "then" clause specifies what happens when that condition is satisfied. For example, in a programming scenario, you might have: "If the temperature is above 100 degrees, then activate the cooling system." This clearly indicates that the cooling system's activation is contingent upon the temperature condition being true.

Other options do not align as closely with the conventional usage of conditional statements. "When and then" suggests a sequence of events rather than a conditional relationship, while "if and else" introduces an alternative branch of logic but does not fully constitute the basic structure of a singular conditional statement. "While and unless" also serves different logical functions and is not typically used to express a direct condition followed by an action.