if (expression) {
   #statement to execute if condition is true
}

# R program to illustrate if statement
 
# assigning value to variable a
a <- 5
 
# condition
if(a > 0)
{
    print("Positive Number")  # Statement
}

Positive Number

# Assigning value to variable x
x <- 12
 
# Condition
if (x > 20)
{
    print("12 is less than 20")  # Statement
}
print("Hello World")

12 is less than 20
Hello World

# R program to illustrate if statement
# assigning value to variable a
a <- -5
 
# condition
if(a > 0)
{
    print("Positive Number")  # Statement
}else{
    print("-ve number")
}

"-ve number"