There is no difference. The statements are equally false.
To find the difference between two numbers, subtract them.
the difference between cm and is that ten cm equals to one dm.
NULL is for pointers, 0, for numbers
Difference between Torque and load
The second would suggest that x equals the string "=3".
There is no difference; it is a matter of choice and convention as to what letter is used.
what is a slope
There is no way to know unless you had an equation that gives the relationship between x and y. For example, if y=2x, then when x equals 99 or x equals 100, then the value of y has a difference of 2.
One megabyte equals 1024 kilobytes.
men equals more
an equation has an equals sign.