What is the difference between = and == ? And when they are used ???

Question

for both c and c++

Answer 1

"=" for 'equals' and "==" for 'is equal to'. If you read your condition with those phrases then you'll better understand the condition you're trying to prove.

The main difference is that the "=" is an assignment operator and the "==" sign tests a condition.

Example: i = num1 + 1. (Assigns num1 + 1 to i)
Example: num1 == num2. (Checks if num1 is equal to num2)

Answer 2

= assigns a value to a variable
== equality, if this is the same as that