To define a variable, the assignment symbol “<-“ can be used:

Example:

 

In the above equation following way we can define variable in R

> a <-1

> b <-1

> c <--1

Following two way we can check any variable:

> a

[1] 1

> print(a)

[1] 1

If we want to check all the define variable, then with the following command we can check it:

> ls()

[1] "a" "b" "c"

Now we have defined the variable, in the following way we can get

> x<-(-b + sqrt(b^2 - 4*a*c))/(2*a)

> x

[1] 0.618034

> x<-(-b - sqrt(b^2 - 4*a*c))/(2*a)

> x

[1] -1.618034