C program to find maximum between two numbers

C program to find maximum between two numbers 

By Ahmad Irshad | C Programming Exercises and Soluntions > If...Else  

C program to input any two numbers from user and find maximum between two both numbrs using if...else and  if...else-if. Let's see the below step by step logic to find the maximum between two numbers. 

Before writing any program you just imagine about output screen first. Like what input to be given, and output to be displayed. Let's have a look at the below example.

1. INPUT
2. 
   
3. Enter any two number: 15, 30
4. 
   

  OUTPUT

30 is maximum.

Required knowledge for this exercise

Input / output | Variables | Data types | If-else | relational operator

Logic to find maximum between two numbers:

In C programming, finding maximum or minimum between two numbers we need comparision of both numbers unig relational operator either > or < along with if...else to find maximum. Relational operator evaluates either 1 (true) or 0 (false) depending on condition.

1) Input two numbers from user and store it in variables num1 or num2 using scanf()

2) Compare both numbersnum1 and num2using below expression

if(num1 > num2).If it's true then print num1is maximum.

else if(num2 > num1).If it's true then print num2is maximum.

else .If above both conditions are false then print both are equal.

Above expressions will return true(1) if condition is satisfied otherwise return false(0).

3)if(num1 > num2)If it's true then printnum1is maximum else print num2is maximum.

Program to find maximum between two umbers using if...else-if: 

1. /* C program to find maximum between two numbers */ #include <stdio.h> int main() { int num1, num2; /* Input two numbers from user */ printf("Enter any two numbers: "); scanf("%d%d", &num1, &num2); /* Compare num1 with num2 */ if(num1 > num2) { printf("%d is maximum", num1); } else if (num2 > num1) { printf("%d is maximum", num2); }
2. else { printf("Both are equal"); } return 0; }

Program to find maximum between two umbers using if...else: 

1. /* C program to find maximum between two numbers */ #include <stdio.h> int main() { int num1, num2; /* Input two numbers from user */ printf("Enter any two numbers: "); scanf("%d%d", &num1, &num2); /* Compare num1 with num2 */ if(num1 > num2) { printf("%d is maximum", num1); }
   
2. else { printf("%d is maximum", num1); } return 0; }

Above program can also be written as below with a little bit chages: 

By storing maximum number in a max variable and then print then resultant value. 

1. /* C program to find maximum between two numbers */ #include <stdio.h> int main() { int num1, num2, max; /* Input two numbers from user */ printf("Enter any two numbers: "); scanf("%d%d", &num1, &num2); /* Compare num1 with num2 */ if(num1 > num2) max = num1;
   
2. else max = num2; printf("%d is maximum", max); return 0; }

As you can see in above programs if or else body contains only single statement. Hence, you can ignore braces { } after if and else statement.

Output:

1. Enter any two number: 15, 30
2. 30 is maximum

Next topic >> to be updated soon.

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