If you mean in Excel, yes: you must always start a formula with an equal sign.
In mathematics, such expressions indicate that the value of the expression to the left of the equal sign has the same value as the expression to the right of the equal sign. In some cases, it can also be interpreted to mean that the expression on one side of the equal sign can be used in place of the expression on the other side of the equal sign (say in manipulating algebraic expressions). In computer languages, the equal sign is sometimes also used to indicate that the value of the expression to the right of the equal sign is to be transferred to the location indicated by the expression to the left of the equal sign. The expression to the left of the equal sign is usually a single variable that represents a memory location.
In Algerbra, an expression is a math sentence, such as 5y+3x, that does not have an equal sign. When you include the equal sign it becomes equation.
A formula with an equal sign
Equals sign demonstrates that something is the same as something, or equal to.
The equal sign with the slash means "is not equal to".
it was the sign of certain monks
By 'an equal sign with a lightning bolt [through it]', do you mean '≠'? That means 'not equal to'. For example, 6≠9.
It means the figures on either side of the equal sign have equal values to each other.
venus rotates backwards in relation to the other planets
It means "not equal to".
not equal to
If you mean in Excel, yes: you must always start a formula with an equal sign.
It is a worded warning sign
Did you mean this? ≟
It means congruent
they were a sign of power and wealth.