Multiple true condition in ifelse command

Question

In R we use ifelse(test, yes, no) command. The problem which i am facing is if a codiation comes out to be true i need to perform various statement, for example

Answer 1

This works:

a <- "01" 
ifelse(a=="01", d <- c(sum(b),sum(c)), d <- 0)
d
#[1]   21 2616

a <- "02"
ifelse(a=="01", d <- c(sum(b),sum(c)), d <-0)
d
#[1] 0

Answer 2

You can use the & ('and') statement. You also need to alocate the sum to the variable, like this:

a <- "01" 
b <- c(1,2,3,4,5,6) 
c <- c(12,13,1234,1334,23) 
d <- ifelse(a=="01",( (b <- sum(b)) & (c <- sum(c)) ),0)