diff --git a/codescience/README.md b/codescience/README.md
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+++ b/codescience/README.md
@@ -0,0 +1,10 @@
+# Basic Calculator
+--------------------------------------------------------
+Enter number one: 6
+Enter number two: 7
+Enter an operator (+, -, *, /, ^, r, s, c): +
+Result: 13.00
+
+# To run the calculator
+* Navigate to the codescience and run:
+* gcc calcul.c main.c -lm
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diff --git a/codescience/calcul.c b/codescience/calcul.c
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+++ b/codescience/calcul.c
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+#include <stdio.h>
+#include <math.h>
+#include "calcul.h"
+
+/**
+ * Function that adds two numbers
+ * @num1: the first number
+ * @num2: the second number
+ * 
+ * Return: the sum of num1 and num2
+ */
+float add(float num1, float num2) {
+    return num1 + num2;
+}
+
+/**
+ * Function that subtracts two numbers
+ * @num1: the first number
+ * @num2: the second number
+ * 
+ * Return: the difference of num1 and num2
+ */
+float subtract(float num1, float num2) {
+    return num1 - num2;
+}
+
+/**
+ * Function that multiplies two numbers
+ * @num1: the first number
+ * @num2: the second number
+ * 
+ * Return: the product of num1 and num2
+ */
+float multiply(float num1, float num2) {
+    return num1 * num2;
+}
+
+/**
+ * Function that divides two numbers
+ * @num1: the first number
+ * @num2: the second number
+ * 
+ * Return: the quotient of num1 and num2, or 0 if num2 is 0
+ */
+float divide(float num1, float num2) {
+    if (num2 != 0) {
+        return num1 / num2;
+    } else {
+        return 0; 
+    }
+}
+
+/**
+ * Function that calculates the power of a base raised to an exponent
+ * @base: the base number
+ * @exponent: the exponent
+ * 
+ * Return: the result of base raised to the exponent
+ */
+float power(float base, float exponent) {
+    return pow(base, exponent);
+}
+
+/**
+ * Function that calculates the square root of a number
+ * @num: the number
+ * 
+ * Return: the square root of num
+ */
+float squareRoot(float num) {
+    return sqrt(num);
+}
+
+/**
+ * Function that calculates the sine of an angle
+ * @angle: the angle
+ * 
+ * Return: the sine of the angle
+ */
+float sine(float angle) {
+    return sin(angle);
+}
+
+/**
+ * Function that calculates the cosine of an angle
+ * @angle: the angle
+ * 
+ * Return: the cosine of the angle
+ */
+float cosine(float angle) {
+    return cos(angle);
+}
diff --git a/codescience/calcul.h b/codescience/calcul.h
new file mode 100644
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--- /dev/null
+++ b/codescience/calcul.h
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+#ifndef CALCUL_H
+#define CALCUL_H
+
+
+/**prototypes*/
+float add(float num1, float num2);
+float subtract(float num1, float num2);
+float multiply(float num1, float num2);
+float divide(float num1, float num2);
+float power(float base, float exponent);
+float squareRoot(float num);
+float sine(float angle);
+float cosine(float angle);
+
+#endif
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diff --git a/codescience/main.c b/codescience/main.c
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index 0000000..9d2bdc2
--- /dev/null
+++ b/codescience/main.c
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+#include <stdio.h>
+#include "calcul.h"
+
+int main(void) {
+    float num1, num2;
+    char operator;
+
+    printf("Enter number one: ");
+    scanf("%f", &num1);
+
+    printf("Enter number two: ");
+    scanf("%f", &num2);
+
+    printf("Enter an operator (+, -, *, /, ^, r, s, c): ");
+    scanf(" %c", &operator);
+
+    float result;
+    switch (operator) {
+        case '+':
+            result = add(num1, num2);
+            break;
+        case '-':
+            result = subtract(num1, num2);
+            break;
+        case '*':
+            result = multiply(num1, num2);
+            break;
+        case '/':
+            result = divide(num1, num2);
+            break;
+        case '^':
+            result = power(num1, num2);
+            break;
+        case 'r':
+            result = squareRoot(num1);
+            break;
+        case 's':
+            result = sine(num1);
+            break;
+        case 'c':
+            result = cosine(num1);
+            break;
+        default:
+            printf("Invalid operator\n");
+            return 1;
+    }
+
+    printf("Result: %.2f\n", result);
+
+    return 0;
+}