R Programming language - R if...else-IGI

In R programming language, if...else statements are used to control the flow of the program based on a Boolean expression. The general syntax of an if...else statement is as follows:

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if (condition) {
  # code to execute if condition is TRUE
} else {
  # code to execute if condition is FALSE
}

The condition is a Boolean expression that evaluates to either TRUE or FALSE. If the condition is TRUE, the code inside the if block is executed, otherwise the code inside the else block is executed.

Here is an example of an if...else statement in R:

x <- 10

if (x > 5) {
  print("x is greater than 5")
} else {
  print("x is less than or equal to 5")
}

In this example, the condition is x > 5. Since x is equal to 10 which is greater than 5, the code inside the if block will be executed, and the output will be x is greater than 5.

You can also use nested if...else statements in R to test multiple conditions. The general syntax for nested if...else statements is as follows:

if (condition1) {
  # code to execute if condition1 is TRUE
} else if (condition2) {
  # code to execute if condition2 is TRUE
} else {
  # code to execute if all conditions are FALSE
}

Here is an example of a nested if...else statement in R:

x <- 10
y <- 20

if (x > y) {
  print("x is greater than y")
} else if (x < y) {
  print("x is less than y")
} else {
  print("x is equal to y")
}

In this example, the condition1 is x > y, and the condition2 is x < y. Since x is not greater than y, but is less than y, the code inside the second if block will be executed, and the output will be x is less than y.

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R Programming language - R if...else