Variables, Input & Output

Definition

Variables name values; input() reads text from the user and print() writes output.

The very first step in every Python program.

Diagram

Flowchart

Example: Fast input for contests

import io, sys
sys.stdin = io.StringIO('3 4\n')
a, b = map(int, input().split())
print(a + b)

Output: 7

Key points

• input() always returns str
• sys.stdin.readline is faster for big inputs

Interview questions

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