C program to Calculate Body Mass Index (BMI)

Given with the weight and height of a person and the task is to find the BMI i.e. body mass index of his body and display it.

For calculating the body mass index we require two things −

• Weight
• Height

BMI can be calculated using the formula given below −

BMI = (mass or weight) / (height*height)

Where weight is in kg and height is in meters

Example

Input 1-: weight = 60.00
   Height = 5.1
Output -: BMI index is : 23.53
Input 2-: weight = 54.00
   Height = 5.4
Output -: BMI index is : 9.3

Approach used below is as follows −

• Input weight(kg) and height(meter) in float variables
• Apply the formula to compute the body mass index
• Print the BMI

Algorithm

Start
Step 1-> Declare function to calculate BMI
   float BMI(float weight, float height)
      return weight/height*2
step 2-> In main()
   Set float weight=60.00
   Set float height=5.1
   Set float bmi = BMI(weight,height)
   Print BMI
Stop

Example

#include<stdio.h>
//function to calculate BMI index
float BMI(float weight, float height) {
   return weight/height*2;
}
int main() {
   float weight=60.00;
   float height=5.1;
   float bmi = BMI(weight,height);
   printf("BMI index is : %.2f ",bmi);
   return 0;
}

Output

IF WE RUN THE ABOVE CODE IT WILL GENERATE FOLLOWING OUTPUT

BMI index is : 23.53