R Program to Make a Simple Calculator

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# Program make a simple calculator that can add, subtract, multiply and divide using functions

add 


Output

[1] "Select operation."
[1] "1.Add"
[1] "2.Subtract"
[1] "3.Multiply"
[1] "4.Divide"
Enter choice[1/2/3/4]: 4
Enter first number: 20
Enter second number: 4
[1] "20 / 4 = 5"

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