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

Concept Flow - Numeric type

Start

↓

Assign numeric value

↓

Store as numeric type

↓

Use in calculations

↓

Output result

↓

End

This flow shows how a numeric value is assigned, stored as a numeric type, used in calculations, and then output.

Execution Sample

R Programming

x <- 5.5
print(x)
y <- x * 2
print(y)

Assign a numeric value to x, print it, multiply by 2, and print the result.

Execution Table

Step	Action	Variable	Value	Output
1	Assign 5.5 to x	x	5.5
2	Print x	x	5.5	5.5
3	Calculate y = x * 2	y	11.0
4	Print y	y	11.0	11
5	End of code

💡 Code ends after printing y.

Variable Tracker

Variable	Start	After Step 1	After Step 3	Final
x	undefined	5.5	5.5	5.5
y	undefined	undefined	11.0	11.0

Key Moments - 2 Insights

Why does x hold 5.5 and not an integer?

Because 5.5 has a decimal point, R stores it as a numeric (double) type, as shown in step 1 of the execution_table.

What happens when we multiply x by 2?

The value of x (5.5) is multiplied by 2 to get 11, which is stored in y, as shown in step 3.

Visual Quiz - 3 Questions

Look at the execution_table at step 2, what is printed?

A x

B 11

C 5.5

D Error

💡 Hint

Check the Output column at step 2 in the execution_table.

At which step is the variable y assigned a value?

A Step 3

B Step 2

C Step 1

D Step 4

💡 Hint

Look at the Action and Variable columns in the execution_table.

If we change x to 3, what will be the value of y at step 3?

A 5.5

B 6

C 3

D 11

💡 Hint

y is calculated as x * 2, so multiply the new x value by 2.

Concept Snapshot

Numeric type in R stores numbers with or without decimals.
Assign with <-, e.g., x <- 5.5.
Used in calculations like y <- x * 2.
Print values with print().
Decimals mean numeric (double) type.

Full Transcript

This example shows how R handles numeric types. First, we assign 5.5 to variable x. Because 5.5 has a decimal, R treats it as a numeric type. We print x, which outputs 5.5. Next, we calculate y by multiplying x by 2, resulting in 11. We print y, which outputs 11. The variables x and y change as the code runs, storing the numeric values. This demonstrates basic numeric assignment and arithmetic in R.