zsh: command not found: from code example

Example 1: zsh: command not found: npm

export NVM_DIR=~/.nvm
 [ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"

Example 2: zsh command not found

source ~/.bash_profile

Example 3: zsh: command not found

PATH=/bin:/usr/bin:/usr/local/bin:${PATH}
export PATH