Integer type in R Programming - Step-by-Step Execution

Concept Flow - Integer type

Start

↓

Assign integer value

↓

Check type with typeof()

↓

Use integer in calculations

↓

Output result

↓

End

This flow shows how an integer value is assigned, checked for type, used in calculations, and then output.

Execution Sample

R Programming

x <- 5L
print(typeof(x))
result <- x + 3L
print(result)

Assign an integer to x, check its type, add another integer, and print the result.

Execution Table

Step	Action	Variable	Value	Type	Output
1	Assign integer 5L to x	x	5	integer
2	Check type of x	x	5	integer	integer
3	Add 3L to x and assign to result	result	8	integer
4	Print result	result	8	integer	8

💡 All steps completed, program ends.

Variable Tracker

Variable	Start	After Step 1	After Step 3	Final
x	undefined	5	5	5
result	undefined	undefined	8	8

Key Moments - 2 Insights

Why do we use 5L instead of just 5 to create an integer?

In R, numbers like 5 are by default 'double' type. Adding L (5L) tells R to treat it as an integer, as shown in step 1 and 2 of the execution_table.

What happens if we add a double and an integer?

R converts the integer to double before adding. Here, both are integers (5L + 3L), so result stays integer, as seen in step 3.

Visual Quiz - 3 Questions

Look at the execution_table, what is the type of variable x at step 2?

A double

B integer

C character

D logical

💡 Hint

Check the 'Type' column in row for step 2 in execution_table.

At which step is the variable 'result' assigned a value?

A Step 1

B Step 2

C Step 3

D Step 4

💡 Hint

Look at the 'Action' and 'Variable' columns in execution_table.

If we change x <- 5L to x <- 5 (without L), what would be the type at step 2?

A double

B integer

C character

D logical

💡 Hint

Recall that numbers without L in R default to double type.

Concept Snapshot

Integer type in R:
- Use L suffix (e.g., 5L) to create integer literals.
- typeof() shows variable type.
- Integer + Integer = Integer.
- Default numbers without L are double type.
- Integers save memory and are exact whole numbers.

Full Transcript

This example shows how to create and use integers in R. We assign 5L to variable x, which makes x an integer. Using typeof(x) confirms this. Then we add another integer 3L to x and store in result. Printing result shows 8. The key point is that adding L after a number makes it an integer type in R, otherwise numbers are double by default. This helps in memory and type control.