Arithmetic operators in R Programming - Step-by-Step Execution

Concept Flow - Arithmetic operators

Start with two numbers

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Choose operator: +, -, *, /, ^

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Perform calculation

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Get result

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Use or print result

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End

This flow shows how arithmetic operators take two numbers, perform the chosen operation, and produce a result.

Execution Sample

R Programming

a <- 10
b <- 3
sum <- a + b
prod <- a * b
pow <- a ^ b

This code calculates the sum, product, and power of two numbers a and b.

Execution Table

Step	Expression	Evaluation	Result
1	a <- 10	Assign 10 to a	a = 10
2	b <- 3	Assign 3 to b	b = 3
3	sum <- a + b	10 + 3	sum = 13
4	prod <- a * b	10 * 3	prod = 30
5	pow <- a ^ b	10 ^ 3	pow = 1000

💡 All arithmetic operations completed and results stored.

Variable Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5
a	undefined	10	10	10	10	10
b	undefined	undefined	3	3	3	3
sum	undefined	undefined	undefined	13	13	13
prod	undefined	undefined	undefined	undefined	30	30
pow	undefined	undefined	undefined	undefined	undefined	1000

Key Moments - 2 Insights

Why does the power operator (^) come after multiplication in the code but is evaluated last in the table?

The code assigns values step by step; each line runs in order. The power operation is on the last line, so it is evaluated last as shown in the execution_table row 5.

Why do variables keep their values after assignment?

Once a variable is assigned a value (like a <- 10), it keeps that value until changed. This is shown in variable_tracker where 'a' stays 10 after step 1.

Visual Quiz - 3 Questions

Look at the execution_table at step 3, what is the value of sum?

A 1000

B 30

C 13

D 3

💡 Hint

Check the 'Result' column in execution_table row 3.

At which step does variable 'prod' get its value?

A Step 4

B Step 2

C Step 3

D Step 5

💡 Hint

Look at the 'Expression' column for 'prod' assignment in execution_table.

If we change b from 3 to 4, what will be the new value of pow at step 5?

A 40

B 10000

C 104

D 1000

💡 Hint

Recall pow = a ^ b, so 10 ^ 4 = 10000.

Concept Snapshot

Arithmetic operators in R:
Use + for addition, - for subtraction,
* for multiplication, / for division,
^ for power (exponentiation).
Example: result <- a + b
Operations happen left to right, line by line.

Full Transcript

This lesson shows how arithmetic operators work in R. We start with two numbers, a and b. We assign values 10 and 3 to them. Then we add them using +, multiply using *, and raise a to the power of b using ^. Each step assigns the result to a new variable. The variables keep their values after assignment. The execution table shows each step's expression, evaluation, and result. The variable tracker shows how values change after each step. This helps beginners see exactly how R calculates and stores results with arithmetic operators.