C if-else
Used for conditional execution of code.
A block of code is given and execueted to check if a given condition is true or flase. It goes for another block if the condition is false. Syntax
A block of code is given and execueted to check if a given condition is true or flase. It goes for another block if the condition is false. Syntax
if (condition) {
// Code to be executed if the condition is true
} else {
// Code to be executed if the condition is false
}
Example
#include <stdio.h>
int main() {
int num = 10;
// Check if num is even or odd
if (num % 2 == 0) {
printf("%d is even.\n", num);
} else {
printf("%d is odd.\n", num);
}
return 0;
}
The above example checks the condition if num % 2 == 0
if the condition is false then it goes to the else block.
if the condition is false then it goes to the else block.
C else if
Multiple conditions are checked using else if.
Syntax
Syntax
if (condition1) {
// Code to be executed if the condition1 is true
} else if(condition2) {
// Code to be executed if the condition1 is false and condition2 is true
} else {
// Code to be executed if all conditions are false
}
Example
#include <stdio.h>
int main() {
int score = 75;
// Grading based on the score
if (score >= 90) {
printf("Grade A\n");
} else if (score >= 80) {
printf("Grade B\n");
} else if (score >= 70) {
printf("Grade C\n");
} else {
printf("Grade F\n");
}
return 0;
}Quick Recap
Topics Covered
C if - else
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Example 1
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