however there are instances that we don't want the fee of a variable to change as an instance permit's declare a variable called pi and set it to 3.14 now right here we want to add an F to represent this as a drift due to the fact by way of default Java compiler sees this quantity as a decimal k now you already know that we use pi to calculate the location of a circle what if earlier than we calculate the region of a circle I come right here and sort pi equals 1 then all our calculations are gonna get messed up we don't want this to take place it truly is whilst biofit we use constants so if we type very last here Java compiler will deal with this as a constant so once we initialize this we can't change its cost in a while you can see right here we've got a compilation error and it says can't assign a value to very last variable pi so pi is a final variable or a consistent now by conference we use all capital letters to name constants so this ought to be PI beautiful now I let you know a touch side tale in one among my early courses that I created years in the past that became c-sharp basics for beginners there I used the equal instance to teach the idea of constants but I pronounce this phrase as P in place of Pi and trust it or no longer to this day human beings make amusing of me for saying P instead of Pi but that is how we discovered this lower back in Iran we pronounce it as P and I think Greek humans additionally say.
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