If - Else
Part of the Fundamentals section of Coddy's C journey — lesson 26 of 63.
The if-else statement allows your program to make decisions based on conditions. If a condition is true, one block of code executes; otherwise, a different block executes.
Let's see how to use an if-else statement:
First, we define a variable:
int age = 17;Now let's check if the person is an adult:
if (age >= 18) {
printf("You are an adult.\n");
} else {
printf("You are a minor.\n");
}Since age is 17, which is less than 18, the output will be:
You are a minor.The if part checks the condition. When the condition is false, the code in the else block executes.
Challenge
EasyWrite a program that:
- Reads an integer representing a student's score from the user
- If the score is greater than or equal to 60, prints "Pass"
- Otherwise, prints "Fail"
Cheat sheet
The if-else statement allows your program to make decisions based on conditions. If a condition is true, one block of code executes; otherwise, a different block executes.
Basic syntax:
if (condition) {
// code to execute if condition is true
} else {
// code to execute if condition is false
}Example:
int age = 17;
if (age >= 18) {
printf("You are an adult.\n");
} else {
printf("You are a minor.\n");
}Since age is 17, which is less than 18, the output will be You are a minor.
Try it yourself
#include <stdio.h>
int main() {
int score;
scanf("%d", &score);
// Don't change above this line
// Write your code here
return 0;
}
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Fundamentals
3Operators
Arithmetic OperatorsModulo OperatorIncrement/DecrementAssignment OperatorsRelational OperatorsLogical Operators Part 1Logical Operators Part 2Logical Operators Part 3Recap Challenge